Algebra lineare Esempi

$[\begin{array}{c} - \frac{4}{7} & \frac{2}{7} & \frac{1}{7} & \frac{1}{7} \\ - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array}]$

Passaggio 1

Choose the row or column with the most $0$ elements. If there are no $0$ elements choose any row or column. Multiply every element in row $1$ by its cofactor and add.

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Passaggio 1.1

Consider the corresponding sign chart.

$| \begin{array}{c} + & - & + & - \\ - & + & - & + \\ + & - & + & - \\ - & + & - & + \end{array} |$

Passaggio 1.2

The cofactor is the minor with the sign changed if the indices match a $-$ position on the sign chart.

Passaggio 1.3

The minor for $a_{11}$ is the determinant with row $1$ and column $1$ deleted.

$| \begin{array}{c} \frac{1}{7} & - \frac{3}{7} & \frac{1}{14} \\ - \frac{2}{7} & \frac{11}{21} & \frac{1}{42} \\ \frac{6}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 1.4

Multiply element $a_{11}$ by its cofactor.

$- \frac{4}{7} | \begin{array}{c} \frac{1}{7} & - \frac{3}{7} & \frac{1}{14} \\ - \frac{2}{7} & \frac{11}{21} & \frac{1}{42} \\ \frac{6}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 1.5

The minor for $a_{12}$ is the determinant with row $1$ and column $2$ deleted.

$| \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 1.6

Multiply element $a_{12}$ by its cofactor.

$- \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 1.7

The minor for $a_{13}$ is the determinant with row $1$ and column $3$ deleted.

$| \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} |$

Passaggio 1.8

Multiply element $a_{13}$ by its cofactor.

$\frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} |$

Passaggio 1.9

The minor for $a_{14}$ is the determinant with row $1$ and column $4$ deleted.

$| \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 1.10

Multiply element $a_{14}$ by its cofactor.

$- \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 1.11

Add the terms together.

$- \frac{4}{7} | \begin{array}{c} \frac{1}{7} & - \frac{3}{7} & \frac{1}{14} \\ - \frac{2}{7} & \frac{11}{21} & \frac{1}{42} \\ \frac{6}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2

Calcola $| \begin{array}{c} \frac{1}{7} & - \frac{3}{7} & \frac{1}{14} \\ - \frac{2}{7} & \frac{11}{21} & \frac{1}{42} \\ \frac{6}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 2.1

Choose the row or column with the most $0$ elements. If there are no $0$ elements choose any row or column. Multiply every element in row $1$ by its cofactor and add.

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Passaggio 2.1.1

Consider the corresponding sign chart.

$| \begin{array}{c} + & - & + \\ - & + & - \\ + & - & + \end{array} |$

Passaggio 2.1.2

The cofactor is the minor with the sign changed if the indices match a $-$ position on the sign chart.

Passaggio 2.1.3

The minor for $a_{11}$ is the determinant with row $1$ and column $1$ deleted.

$| \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 2.1.4

Multiply element $a_{11}$ by its cofactor.

$\frac{1}{7} | \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 2.1.5

The minor for $a_{12}$ is the determinant with row $1$ and column $2$ deleted.

$| \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} |$

Passaggio 2.1.6

Multiply element $a_{12}$ by its cofactor.

$\frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} |$

Passaggio 2.1.7

The minor for $a_{13}$ is the determinant with row $1$ and column $3$ deleted.

$| \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.1.8

Multiply element $a_{13}$ by its cofactor.

$\frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.1.9

Add the terms together.

$- \frac{4}{7} (\frac{1}{7} | \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2

Calcola $| \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 2.2.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} (\frac{1}{7} (\frac{11}{21} (- \frac{1}{14}) - (- \frac{18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2

Semplifica il determinante.

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Passaggio 2.2.2.1

Semplifica ciascun termine.

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Passaggio 2.2.2.1.1

Moltiplica $\frac{11}{21} (- \frac{1}{14})$ .

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Passaggio 2.2.2.1.1.1

Moltiplica $\frac{11}{21}$ per $\frac{1}{14}$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{21 \cdot 14} - (- \frac{18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.1.2

Moltiplica $21$ per $14$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - (- \frac{18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.2

Elimina il fattore comune di $6$ .

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Passaggio 2.2.2.1.2.1

Sposta il negativo all'inizio di $- \frac{18}{7}$ nel numeratore.

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - (\frac{- 18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.2.2

Scomponi $6$ da $- 18$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - (\frac{6 (- 3)}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.2.3

Scomponi $6$ da $42$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - (\frac{6 \cdot - 3}{7} \cdot \frac{1}{6 \cdot 7})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.2.4

Elimina il fattore comune.

Passaggio 2.2.2.1.2.5

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - (\frac{- 3}{7} \cdot \frac{1}{7})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.3

Moltiplica $\frac{- 3}{7}$ per $\frac{1}{7}$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - \frac{- 3}{7 \cdot 7}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - \frac{- 3}{49}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} - - \frac{3}{49}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.6

Moltiplica $- - \frac{3}{49}$ .

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Passaggio 2.2.2.1.6.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} + 1 (\frac{3}{49})) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.1.6.2

Moltiplica $\frac{3}{49}$ per $1$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} + \frac{3}{49}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.2

Per scrivere $\frac{3}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{6}{6}$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} + \frac{3}{49} \cdot \frac{6}{6}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.3

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 2.2.2.3.1

Moltiplica $\frac{3}{49}$ per $\frac{6}{6}$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} + \frac{3 \cdot 6}{49 \cdot 6}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.3.2

Moltiplica $49$ per $6$ .

$- \frac{4}{7} (\frac{1}{7} (- \frac{11}{294} + \frac{3 \cdot 6}{294}) + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.4

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{- 11 + 3 \cdot 6}{294} + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.5

Semplifica il numeratore.

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Passaggio 2.2.2.5.1

Moltiplica $3$ per $6$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{- 11 + 18}{294} + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.5.2

Somma $- 11$ e $18$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{7}{294} + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.6

Elimina il fattore comune di $7$ e $294$ .

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Passaggio 2.2.2.6.1

Scomponi $7$ da $7$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{7 (1)}{294} + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.6.2

Elimina i fattori comuni.

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Passaggio 2.2.2.6.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{7 \cdot 1}{7 \cdot 42} + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.2.2.6.2.2

Elimina il fattore comune.

Passaggio 2.2.2.6.2.3

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3

Calcola $| \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 2.3.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{2}{7} (- \frac{1}{14}) - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2

Semplifica il determinante.

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Passaggio 2.3.2.1

Semplifica ciascun termine.

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Passaggio 2.3.2.1.1

Elimina il fattore comune di $2$ .

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Passaggio 2.3.2.1.1.1

Sposta il negativo all'inizio di $- \frac{2}{7}$ nel numeratore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{- 2}{7} (- \frac{1}{14}) - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.1.2

Sposta il negativo all'inizio di $- \frac{1}{14}$ nel numeratore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{- 2}{7} \cdot \frac{- 1}{14} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.1.3

Scomponi $2$ da $- 2$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{2 (- 1)}{7} \cdot \frac{- 1}{14} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.1.4

Scomponi $2$ da $14$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{2 \cdot - 1}{7} \cdot \frac{- 1}{2 \cdot 7} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.1.5

Elimina il fattore comune.

Passaggio 2.3.2.1.1.6

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{- 1}{7} \cdot \frac{- 1}{7} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.2

Moltiplica $\frac{- 1}{7}$ per $\frac{- 1}{7}$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{- - 1}{7 \cdot 7} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.3

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{7 \cdot 7} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} - \frac{6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.5

Elimina il fattore comune di $6$ .

Tocca per altri passaggi...

Passaggio 2.3.2.1.5.1

Sposta il negativo all'inizio di $- \frac{6}{7}$ nel numeratore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} + \frac{- 6}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.5.2

Scomponi $6$ da $- 6$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} + \frac{6 (- 1)}{7} \cdot \frac{1}{42}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.5.3

Scomponi $6$ da $42$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} + \frac{6 \cdot - 1}{7} \cdot \frac{1}{6 \cdot 7}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.5.4

Elimina il fattore comune.

Passaggio 2.3.2.1.5.5

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} + \frac{- 1}{7} \cdot \frac{1}{7}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.6

Moltiplica $\frac{- 1}{7}$ per $\frac{1}{7}$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} + \frac{- 1}{7 \cdot 7}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.7

Moltiplica $7$ per $7$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} + \frac{- 1}{49}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.1.8

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{1}{49} - \frac{1}{49}) + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1 - 1}{49} + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.3

Sottrai $1$ da $1$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{0}{49} + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.3.2.4

Dividi $0$ per $49$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4

Calcola $| \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |$ .

Tocca per altri passaggi...

Passaggio 2.4.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (- \frac{2}{7} (- \frac{18}{7}) - \frac{6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2

Semplifica il determinante.

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Passaggio 2.4.2.1

Semplifica ciascun termine.

Tocca per altri passaggi...

Passaggio 2.4.2.1.1

Moltiplica $- \frac{2}{7} (- \frac{18}{7})$ .

Tocca per altri passaggi...

Passaggio 2.4.2.1.1.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (1 (\frac{2}{7}) \frac{18}{7} - \frac{6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.1.2

Moltiplica $\frac{2}{7}$ per $1$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{2}{7} \cdot \frac{18}{7} - \frac{6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.1.3

Moltiplica $\frac{2}{7}$ per $\frac{18}{7}$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{2 \cdot 18}{7 \cdot 7} - \frac{6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.1.4

Moltiplica $2$ per $18$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{7 \cdot 7} - \frac{6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.1.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} - \frac{6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.2

Elimina il fattore comune di $3$ .

Tocca per altri passaggi...

Passaggio 2.4.2.1.2.1

Sposta il negativo all'inizio di $- \frac{6}{7}$ nel numeratore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{- 6}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.2.2

Scomponi $3$ da $- 6$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{3 (- 2)}{7} \cdot \frac{11}{21})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.2.3

Scomponi $3$ da $21$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{3 \cdot - 2}{7} \cdot \frac{11}{3 \cdot 7})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.2.4

Elimina il fattore comune.

Passaggio 2.4.2.1.2.5

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{- 2}{7} \cdot \frac{11}{7})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.3

Moltiplica $\frac{- 2}{7}$ per $\frac{11}{7}$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{- 2 \cdot 11}{7 \cdot 7})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.4

Moltiplica $- 2$ per $11$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{- 22}{7 \cdot 7})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} + \frac{- 22}{49})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.1.6

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} (\frac{36}{49} - \frac{22}{49})) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{36 - 22}{49}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.3

Sottrai $22$ da $36$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{14}{49}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.4

Elimina il fattore comune di $14$ e $49$ .

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Passaggio 2.4.2.4.1

Scomponi $7$ da $14$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{7 (2)}{49}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.4.2

Elimina i fattori comuni.

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Passaggio 2.4.2.4.2.1

Scomponi $7$ da $49$ .

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{7 \cdot 2}{7 \cdot 7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.4.2.4.2.2

Elimina il fattore comune.

Passaggio 2.4.2.4.2.3

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{2}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5

Semplifica il determinante.

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Passaggio 2.5.1

Semplifica ciascun termine.

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Passaggio 2.5.1.1

Moltiplica $\frac{1}{7} \cdot \frac{1}{42}$ .

Tocca per altri passaggi...

Passaggio 2.5.1.1.1

Moltiplica $\frac{1}{7}$ per $\frac{1}{42}$ .

$- \frac{4}{7} (\frac{1}{7 \cdot 42} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{2}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.1.2

Moltiplica $7$ per $42$ .

$- \frac{4}{7} (\frac{1}{294} + \frac{3}{7} \cdot 0 + \frac{1}{14} \cdot \frac{2}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.2

Moltiplica $\frac{3}{7}$ per $0$ .

$- \frac{4}{7} (\frac{1}{294} + 0 + \frac{1}{14} \cdot \frac{2}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.3

Elimina il fattore comune di $2$ .

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Passaggio 2.5.1.3.1

Scomponi $2$ da $14$ .

$- \frac{4}{7} (\frac{1}{294} + 0 + \frac{1}{2 (7)} \cdot \frac{2}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.3.2

Elimina il fattore comune.

$- \frac{4}{7} (\frac{1}{294} + 0 + \frac{1}{2 \cdot 7} \cdot \frac{2}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.3.3

Riscrivi l'espressione.

$- \frac{4}{7} (\frac{1}{294} + 0 + \frac{1}{7} \cdot \frac{1}{7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.4

Moltiplica $\frac{1}{7}$ per $\frac{1}{7}$ .

$- \frac{4}{7} (\frac{1}{294} + 0 + \frac{1}{7 \cdot 7}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.1.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} (\frac{1}{294} + 0 + \frac{1}{49}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.2

Somma $\frac{1}{294}$ e $0$ .

$- \frac{4}{7} (\frac{1}{294} + \frac{1}{49}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.3

Per scrivere $\frac{1}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{6}{6}$ .

$- \frac{4}{7} (\frac{1}{294} + \frac{1}{49} \cdot \frac{6}{6}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.4

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 2.5.4.1

Moltiplica $\frac{1}{49}$ per $\frac{6}{6}$ .

$- \frac{4}{7} (\frac{1}{294} + \frac{6}{49 \cdot 6}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.4.2

Moltiplica $49$ per $6$ .

$- \frac{4}{7} (\frac{1}{294} + \frac{6}{294}) - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.5

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1 + 6}{294} - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.6

Somma $1$ e $6$ .

$- \frac{4}{7} \cdot \frac{7}{294} - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.7

Elimina il fattore comune di $7$ e $294$ .

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Passaggio 2.5.7.1

Scomponi $7$ da $7$ .

$- \frac{4}{7} \cdot \frac{7 (1)}{294} - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.7.2

Elimina i fattori comuni.

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Passaggio 2.5.7.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} \cdot \frac{7 \cdot 1}{7 \cdot 42} - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 2.5.7.2.2

Elimina il fattore comune.

Passaggio 2.5.7.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} | \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3

Calcola $| \begin{array}{c} - \frac{9}{7} & - \frac{3}{7} & \frac{1}{14} \\ \frac{40}{21} & \frac{11}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{18}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 3.1

Choose the row or column with the most $0$ elements. If there are no $0$ elements choose any row or column. Multiply every element in row $1$ by its cofactor and add.

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Passaggio 3.1.1

Consider the corresponding sign chart.

$| \begin{array}{c} + & - & + \\ - & + & - \\ + & - & + \end{array} |$

Passaggio 3.1.2

The cofactor is the minor with the sign changed if the indices match a $-$ position on the sign chart.

Passaggio 3.1.3

The minor for $a_{11}$ is the determinant with row $1$ and column $1$ deleted.

$| \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 3.1.4

Multiply element $a_{11}$ by its cofactor.

$- \frac{9}{7} | \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} |$

Passaggio 3.1.5

The minor for $a_{12}$ is the determinant with row $1$ and column $2$ deleted.

$| \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} |$

Passaggio 3.1.6

Multiply element $a_{12}$ by its cofactor.

$\frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} |$

Passaggio 3.1.7

The minor for $a_{13}$ is the determinant with row $1$ and column $3$ deleted.

$| \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.1.8

Multiply element $a_{13}$ by its cofactor.

$\frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.1.9

Add the terms together.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} | \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} | + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2

Calcola $| \begin{array}{c} \frac{11}{21} & \frac{1}{42} \\ - \frac{18}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 3.2.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (\frac{11}{21} (- \frac{1}{14}) - (- \frac{18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2

Semplifica il determinante.

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Passaggio 3.2.2.1

Semplifica ciascun termine.

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Passaggio 3.2.2.1.1

Moltiplica $\frac{11}{21} (- \frac{1}{14})$ .

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Passaggio 3.2.2.1.1.1

Moltiplica $\frac{11}{21}$ per $\frac{1}{14}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{21 \cdot 14} - (- \frac{18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.1.2

Moltiplica $21$ per $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - (- \frac{18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.2

Elimina il fattore comune di $6$ .

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Passaggio 3.2.2.1.2.1

Sposta il negativo all'inizio di $- \frac{18}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - (\frac{- 18}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.2.2

Scomponi $6$ da $- 18$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - (\frac{6 (- 3)}{7} \cdot \frac{1}{42})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.2.3

Scomponi $6$ da $42$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - (\frac{6 \cdot - 3}{7} \cdot \frac{1}{6 \cdot 7})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.2.4

Elimina il fattore comune.

Passaggio 3.2.2.1.2.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - (\frac{- 3}{7} \cdot \frac{1}{7})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.3

Moltiplica $\frac{- 3}{7}$ per $\frac{1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - \frac{- 3}{7 \cdot 7}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - \frac{- 3}{49}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} - - \frac{3}{49}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.6

Moltiplica $- - \frac{3}{49}$ .

Tocca per altri passaggi...

Passaggio 3.2.2.1.6.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} + 1 (\frac{3}{49})) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.1.6.2

Moltiplica $\frac{3}{49}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} + \frac{3}{49}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.2

Per scrivere $\frac{3}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{6}{6}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} + \frac{3}{49} \cdot \frac{6}{6}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.3

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

Tocca per altri passaggi...

Passaggio 3.2.2.3.1

Moltiplica $\frac{3}{49}$ per $\frac{6}{6}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} + \frac{3 \cdot 6}{49 \cdot 6}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.3.2

Moltiplica $49$ per $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} (- \frac{11}{294} + \frac{3 \cdot 6}{294}) + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.4

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{- 11 + 3 \cdot 6}{294} + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.5

Semplifica il numeratore.

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Passaggio 3.2.2.5.1

Moltiplica $3$ per $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{- 11 + 18}{294} + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.5.2

Somma $- 11$ e $18$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{7}{294} + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.6

Elimina il fattore comune di $7$ e $294$ .

Tocca per altri passaggi...

Passaggio 3.2.2.6.1

Scomponi $7$ da $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{7 (1)}{294} + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.6.2

Elimina i fattori comuni.

Tocca per altri passaggi...

Passaggio 3.2.2.6.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{7 \cdot 1}{7 \cdot 42} + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.2.2.6.2.2

Elimina il fattore comune.

Passaggio 3.2.2.6.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3

Calcola $| \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 3.3.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{40}{21} (- \frac{1}{14}) - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2

Semplifica il determinante.

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Passaggio 3.3.2.1

Semplifica ciascun termine.

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Passaggio 3.3.2.1.1

Elimina il fattore comune di $2$ .

Tocca per altri passaggi...

Passaggio 3.3.2.1.1.1

Sposta il negativo all'inizio di $- \frac{1}{14}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{40}{21} \cdot \frac{- 1}{14} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.1.2

Scomponi $2$ da $40$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{2 (20)}{21} \cdot \frac{- 1}{14} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.1.3

Scomponi $2$ da $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{2 \cdot 20}{21} \cdot \frac{- 1}{2 \cdot 7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.1.4

Elimina il fattore comune.

Passaggio 3.3.2.1.1.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{20}{21} \cdot \frac{- 1}{7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.2

Moltiplica $\frac{20}{21}$ per $\frac{- 1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{20 \cdot - 1}{21 \cdot 7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.3

Moltiplica $20$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{- 20}{21 \cdot 7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.4

Moltiplica $21$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (\frac{- 20}{147} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20}{147} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.6

Moltiplica $- \frac{47}{7} \cdot \frac{1}{42}$ .

Tocca per altri passaggi...

Passaggio 3.3.2.1.6.1

Moltiplica $\frac{1}{42}$ per $\frac{47}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20}{147} - - \frac{47}{42 \cdot 7}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.6.2

Moltiplica $42$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20}{147} - - \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.7

Moltiplica $- - \frac{47}{294}$ .

Tocca per altri passaggi...

Passaggio 3.3.2.1.7.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20}{147} + 1 (\frac{47}{294})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.1.7.2

Moltiplica $\frac{47}{294}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20}{147} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.2

Per scrivere $- \frac{20}{147}$ come una frazione con un comune denominatore, moltiplicala per $\frac{2}{2}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20}{147} \cdot \frac{2}{2} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.3

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

Tocca per altri passaggi...

Passaggio 3.3.2.3.1

Moltiplica $\frac{20}{147}$ per $\frac{2}{2}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20 \cdot 2}{147 \cdot 2} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.3.2

Moltiplica $147$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} (- \frac{20 \cdot 2}{294} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.4

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{- 20 \cdot 2 + 47}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.5

Semplifica il numeratore.

Tocca per altri passaggi...

Passaggio 3.3.2.5.1

Moltiplica $- 20$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{- 40 + 47}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.5.2

Somma $- 40$ e $47$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{7}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.6

Elimina il fattore comune di $7$ e $294$ .

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Passaggio 3.3.2.6.1

Scomponi $7$ da $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{7 (1)}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.6.2

Elimina i fattori comuni.

Tocca per altri passaggi...

Passaggio 3.3.2.6.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{7 \cdot 1}{7 \cdot 42} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.3.2.6.2.2

Elimina il fattore comune.

Passaggio 3.3.2.6.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4

Calcola $| \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |$ .

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Passaggio 3.4.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{21} (- \frac{18}{7}) - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2

Semplifica il determinante.

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Passaggio 3.4.2.1

Semplifica ciascun termine.

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Passaggio 3.4.2.1.1

Elimina il fattore comune di $3$ .

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Passaggio 3.4.2.1.1.1

Sposta il negativo all'inizio di $- \frac{18}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{21} \cdot \frac{- 18}{7} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.1.2

Scomponi $3$ da $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{3 (7)} \cdot \frac{- 18}{7} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.1.3

Scomponi $3$ da $- 18$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{3 \cdot 7} \cdot \frac{3 \cdot - 6}{7} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.1.4

Elimina il fattore comune.

Passaggio 3.4.2.1.1.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{7} \cdot \frac{- 6}{7} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.2

Moltiplica $\frac{40}{7}$ per $\frac{- 6}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40 \cdot - 6}{7 \cdot 7} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.3

Moltiplica $40$ per $- 6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{- 240}{7 \cdot 7} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{- 240}{49} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} - (- \frac{47}{7} \cdot \frac{11}{21}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.6

Moltiplica $- \frac{47}{7} \cdot \frac{11}{21}$ .

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Passaggio 3.4.2.1.6.1

Moltiplica $\frac{11}{21}$ per $\frac{47}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} - - \frac{11 \cdot 47}{21 \cdot 7})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.6.2

Moltiplica $11$ per $47$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} - - \frac{517}{21 \cdot 7})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.6.3

Moltiplica $21$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} - - \frac{517}{147})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.7

Moltiplica $- - \frac{517}{147}$ .

Tocca per altri passaggi...

Passaggio 3.4.2.1.7.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} + 1 (\frac{517}{147}))) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.1.7.2

Moltiplica $\frac{517}{147}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} + \frac{517}{147})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.2

Per scrivere $- \frac{240}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{3}{3}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240}{49} \cdot \frac{3}{3} + \frac{517}{147})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.3

Scrivi ogni espressione con un comune denominatore di $147$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

Tocca per altri passaggi...

Passaggio 3.4.2.3.1

Moltiplica $\frac{240}{49}$ per $\frac{3}{3}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240 \cdot 3}{49 \cdot 3} + \frac{517}{147})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.3.2

Moltiplica $49$ per $3$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{240 \cdot 3}{147} + \frac{517}{147})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.4

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{- 240 \cdot 3 + 517}{147}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.5

Semplifica il numeratore.

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Passaggio 3.4.2.5.1

Moltiplica $- 240$ per $3$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{- 720 + 517}{147}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.5.2

Somma $- 720$ e $517$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{- 203}{147}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.6

Elimina il fattore comune di $- 203$ e $147$ .

Tocca per altri passaggi...

Passaggio 3.4.2.6.1

Scomponi $7$ da $- 203$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{7 (- 29)}{147}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.6.2

Elimina i fattori comuni.

Tocca per altri passaggi...

Passaggio 3.4.2.6.2.1

Scomponi $7$ da $147$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{7 \cdot - 29}{7 \cdot 21}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.6.2.2

Elimina il fattore comune.

Passaggio 3.4.2.6.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{- 29}{21}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.4.2.7

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5

Semplifica il determinante.

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Passaggio 3.5.1

Semplifica ciascun termine.

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Passaggio 3.5.1.1

Elimina il fattore comune di $3$ .

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Passaggio 3.5.1.1.1

Sposta il negativo all'inizio di $- \frac{9}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 9}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.1.2

Scomponi $3$ da $- 9$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{3 (- 3)}{7} \cdot \frac{1}{42} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.1.3

Scomponi $3$ da $42$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{3 \cdot - 3}{7} \cdot \frac{1}{3 \cdot 14} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.1.4

Elimina il fattore comune.

Passaggio 3.5.1.1.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 3}{7} \cdot \frac{1}{14} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.2

Moltiplica $\frac{- 3}{7}$ per $\frac{1}{14}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 3}{7 \cdot 14} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.3

Moltiplica $7$ per $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 3}{98} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.4

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{3}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.5

Elimina il fattore comune di $3$ .

Tocca per altri passaggi...

Passaggio 3.5.1.5.1

Scomponi $3$ da $42$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{3}{7} \cdot \frac{1}{3 (14)} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.5.2

Elimina il fattore comune.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{3}{7} \cdot \frac{1}{3 \cdot 14} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.5.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{1}{7} \cdot \frac{1}{14} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.6

Moltiplica $\frac{1}{7}$ per $\frac{1}{14}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{1}{7 \cdot 14} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.7

Moltiplica $7$ per $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{1}{98} + \frac{1}{14} (- \frac{29}{21})) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.8

Moltiplica $\frac{1}{14} (- \frac{29}{21})$ .

Tocca per altri passaggi...

Passaggio 3.5.1.8.1

Moltiplica $\frac{1}{14}$ per $\frac{29}{21}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{1}{98} - \frac{29}{14 \cdot 21}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.1.8.2

Moltiplica $14$ per $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{3}{98} + \frac{1}{98} - \frac{29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 3 + 1}{98} + \frac{- 29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.3

Somma $- 3$ e $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 2}{98} + \frac{- 29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.4

Semplifica ciascun termine.

Tocca per altri passaggi...

Passaggio 3.5.4.1

Elimina il fattore comune di $- 2$ e $98$ .

Tocca per altri passaggi...

Passaggio 3.5.4.1.1

Scomponi $2$ da $- 2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{2 (- 1)}{98} + \frac{- 29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.4.1.2

Elimina i fattori comuni.

Tocca per altri passaggi...

Passaggio 3.5.4.1.2.1

Scomponi $2$ da $98$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{2 \cdot - 1}{2 \cdot 49} + \frac{- 29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.4.1.2.2

Elimina il fattore comune.

Passaggio 3.5.4.1.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (\frac{- 1}{49} + \frac{- 29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.4.2

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{1}{49} + \frac{- 29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.4.3

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{1}{49} - \frac{29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.5

Per scrivere $- \frac{1}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{6}{6}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{1}{49} \cdot \frac{6}{6} - \frac{29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.6

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

Tocca per altri passaggi...

Passaggio 3.5.6.1

Moltiplica $\frac{1}{49}$ per $\frac{6}{6}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{6}{49 \cdot 6} - \frac{29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.6.2

Moltiplica $49$ per $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{6}{294} - \frac{29}{294}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.7

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} \cdot \frac{- 6 - 29}{294} + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.8

Sottrai $29$ da $- 6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} \cdot \frac{- 35}{294} + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.9

Elimina il fattore comune di $- 35$ e $294$ .

Tocca per altri passaggi...

Passaggio 3.5.9.1

Scomponi $7$ da $- 35$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} \cdot \frac{7 (- 5)}{294} + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.9.2

Elimina i fattori comuni.

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Passaggio 3.5.9.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} \cdot \frac{7 \cdot - 5}{7 \cdot 42} + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.9.2.2

Elimina il fattore comune.

Passaggio 3.5.9.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} \cdot \frac{- 5}{42} + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 3.5.10

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4

Calcola $| \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & \frac{1}{14} \\ \frac{40}{21} & - \frac{2}{7} & \frac{1}{42} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 4.1

Choose the row or column with the most $0$ elements. If there are no $0$ elements choose any row or column. Multiply every element in row $1$ by its cofactor and add.

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Passaggio 4.1.1

Consider the corresponding sign chart.

$| \begin{array}{c} + & - & + \\ - & + & - \\ + & - & + \end{array} |$

Passaggio 4.1.2

The cofactor is the minor with the sign changed if the indices match a $-$ position on the sign chart.

Passaggio 4.1.3

The minor for $a_{11}$ is the determinant with row $1$ and column $1$ deleted.

$| \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} |$

Passaggio 4.1.4

Multiply element $a_{11}$ by its cofactor.

$- \frac{9}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} |$

Passaggio 4.1.5

The minor for $a_{12}$ is the determinant with row $1$ and column $2$ deleted.

$| \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} |$

Passaggio 4.1.6

Multiply element $a_{12}$ by its cofactor.

$- \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} |$

Passaggio 4.1.7

The minor for $a_{13}$ is the determinant with row $1$ and column $3$ deleted.

$| \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |$

Passaggio 4.1.8

Multiply element $a_{13}$ by its cofactor.

$\frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |$

Passaggio 4.1.9

Add the terms together.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} | \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} | - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2

Calcola $| \begin{array}{c} - \frac{2}{7} & \frac{1}{42} \\ \frac{6}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 4.2.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (- \frac{2}{7} (- \frac{1}{14}) - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2

Semplifica il determinante.

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Passaggio 4.2.2.1

Semplifica ciascun termine.

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Passaggio 4.2.2.1.1

Elimina il fattore comune di $2$ .

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Passaggio 4.2.2.1.1.1

Sposta il negativo all'inizio di $- \frac{2}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{- 2}{7} (- \frac{1}{14}) - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.1.2

Sposta il negativo all'inizio di $- \frac{1}{14}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{- 2}{7} \cdot \frac{- 1}{14} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.1.3

Scomponi $2$ da $- 2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{2 (- 1)}{7} \cdot \frac{- 1}{14} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.1.4

Scomponi $2$ da $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{2 \cdot - 1}{7} \cdot \frac{- 1}{2 \cdot 7} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.1.5

Elimina il fattore comune.

Passaggio 4.2.2.1.1.6

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{- 1}{7} \cdot \frac{- 1}{7} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.2

Moltiplica $\frac{- 1}{7}$ per $\frac{- 1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{- - 1}{7 \cdot 7} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.3

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{7 \cdot 7} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} - \frac{6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.5

Elimina il fattore comune di $6$ .

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Passaggio 4.2.2.1.5.1

Sposta il negativo all'inizio di $- \frac{6}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} + \frac{- 6}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.5.2

Scomponi $6$ da $- 6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} + \frac{6 (- 1)}{7} \cdot \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.5.3

Scomponi $6$ da $42$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} + \frac{6 \cdot - 1}{7} \cdot \frac{1}{6 \cdot 7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.5.4

Elimina il fattore comune.

Passaggio 4.2.2.1.5.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} + \frac{- 1}{7} \cdot \frac{1}{7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.6

Moltiplica $\frac{- 1}{7}$ per $\frac{1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} + \frac{- 1}{7 \cdot 7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.7

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} + \frac{- 1}{49}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.1.8

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} (\frac{1}{49} - \frac{1}{49}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot \frac{1 - 1}{49} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.3

Sottrai $1$ da $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot \frac{0}{49} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.2.2.4

Dividi $0$ per $49$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} | + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3

Calcola $| \begin{array}{c} \frac{40}{21} & \frac{1}{42} \\ - \frac{47}{7} & - \frac{1}{14} \end{array} |$ .

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Passaggio 4.3.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{40}{21} (- \frac{1}{14}) - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2

Semplifica il determinante.

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Passaggio 4.3.2.1

Semplifica ciascun termine.

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Passaggio 4.3.2.1.1

Elimina il fattore comune di $2$ .

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Passaggio 4.3.2.1.1.1

Sposta il negativo all'inizio di $- \frac{1}{14}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{40}{21} \cdot \frac{- 1}{14} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.1.2

Scomponi $2$ da $40$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{2 (20)}{21} \cdot \frac{- 1}{14} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.1.3

Scomponi $2$ da $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{2 \cdot 20}{21} \cdot \frac{- 1}{2 \cdot 7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.1.4

Elimina il fattore comune.

Passaggio 4.3.2.1.1.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{20}{21} \cdot \frac{- 1}{7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.2

Moltiplica $\frac{20}{21}$ per $\frac{- 1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{20 \cdot - 1}{21 \cdot 7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.3

Moltiplica $20$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{- 20}{21 \cdot 7} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.4

Moltiplica $21$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (\frac{- 20}{147} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20}{147} - (- \frac{47}{7} \cdot \frac{1}{42})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.6

Moltiplica $- \frac{47}{7} \cdot \frac{1}{42}$ .

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Passaggio 4.3.2.1.6.1

Moltiplica $\frac{1}{42}$ per $\frac{47}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20}{147} - - \frac{47}{42 \cdot 7}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.6.2

Moltiplica $42$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20}{147} - - \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.7

Moltiplica $- - \frac{47}{294}$ .

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Passaggio 4.3.2.1.7.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20}{147} + 1 (\frac{47}{294})) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.1.7.2

Moltiplica $\frac{47}{294}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20}{147} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.2

Per scrivere $- \frac{20}{147}$ come una frazione con un comune denominatore, moltiplicala per $\frac{2}{2}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20}{147} \cdot \frac{2}{2} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.3

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 4.3.2.3.1

Moltiplica $\frac{20}{147}$ per $\frac{2}{2}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20 \cdot 2}{147 \cdot 2} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.3.2

Moltiplica $147$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} (- \frac{20 \cdot 2}{294} + \frac{47}{294}) + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.4

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{- 20 \cdot 2 + 47}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.5

Semplifica il numeratore.

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Passaggio 4.3.2.5.1

Moltiplica $- 20$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{- 40 + 47}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.5.2

Somma $- 40$ e $47$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{7}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.6

Elimina il fattore comune di $7$ e $294$ .

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Passaggio 4.3.2.6.1

Scomponi $7$ da $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{7 (1)}{294} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.6.2

Elimina i fattori comuni.

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Passaggio 4.3.2.6.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{7 \cdot 1}{7 \cdot 42} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.3.2.6.2.2

Elimina il fattore comune.

Passaggio 4.3.2.6.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4

Calcola $| \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |$ .

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Passaggio 4.4.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{21} \cdot \frac{6}{7} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2

Semplifica il determinante.

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Passaggio 4.4.2.1

Semplifica ciascun termine.

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Passaggio 4.4.2.1.1

Elimina il fattore comune di $3$ .

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Passaggio 4.4.2.1.1.1

Scomponi $3$ da $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{3 (7)} \cdot \frac{6}{7} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.1.2

Scomponi $3$ da $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{3 \cdot 7} \cdot \frac{3 \cdot 2}{7} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.1.3

Elimina il fattore comune.

Passaggio 4.4.2.1.1.4

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40}{7} \cdot \frac{2}{7} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.2

Moltiplica $\frac{40}{7}$ per $\frac{2}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{40 \cdot 2}{7 \cdot 7} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.3

Moltiplica $40$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{7 \cdot 7} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{49} - (- \frac{47}{7} (- \frac{2}{7})))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.5

Moltiplica $- \frac{47}{7} (- \frac{2}{7})$ .

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Passaggio 4.4.2.1.5.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{49} - (1 (\frac{47}{7}) \frac{2}{7}))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.5.2

Moltiplica $\frac{47}{7}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{49} - (\frac{47}{7} \cdot \frac{2}{7}))) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.5.3

Moltiplica $\frac{47}{7}$ per $\frac{2}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{49} - \frac{47 \cdot 2}{7 \cdot 7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.5.4

Moltiplica $47$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{49} - \frac{94}{7 \cdot 7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.1.5.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (\frac{80}{49} - \frac{94}{49})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{80 - 94}{49}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.3

Sottrai $94$ da $80$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{- 14}{49}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.4

Elimina il fattore comune di $- 14$ e $49$ .

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Passaggio 4.4.2.4.1

Scomponi $7$ da $- 14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{7 (- 2)}{49}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.4.2

Elimina i fattori comuni.

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Passaggio 4.4.2.4.2.1

Scomponi $7$ da $49$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{7 \cdot - 2}{7 \cdot 7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.4.2.2

Elimina il fattore comune.

Passaggio 4.4.2.4.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} \cdot \frac{- 2}{7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.4.2.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{9}{7} \cdot 0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{2}{7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5

Semplifica il determinante.

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Passaggio 4.5.1

Semplifica ciascun termine.

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Passaggio 4.5.1.1

Moltiplica $- \frac{9}{7} \cdot 0$ .

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Passaggio 4.5.1.1.1

Moltiplica $0$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 (\frac{9}{7}) - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{2}{7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.1.2

Moltiplica $0$ per $\frac{9}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{7} \cdot \frac{1}{42} + \frac{1}{14} (- \frac{2}{7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.2

Moltiplica $- \frac{1}{7} \cdot \frac{1}{42}$ .

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Passaggio 4.5.1.2.1

Moltiplica $\frac{1}{42}$ per $\frac{1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{42 \cdot 7} + \frac{1}{14} (- \frac{2}{7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.2.2

Moltiplica $42$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{1}{14} (- \frac{2}{7})) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.3

Elimina il fattore comune di $2$ .

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Passaggio 4.5.1.3.1

Sposta il negativo all'inizio di $- \frac{2}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{1}{14} \cdot \frac{- 2}{7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.3.2

Scomponi $2$ da $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{1}{2 (7)} \cdot \frac{- 2}{7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.3.3

Scomponi $2$ da $- 2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{1}{2 \cdot 7} \cdot \frac{2 \cdot - 1}{7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.3.4

Elimina il fattore comune.

Passaggio 4.5.1.3.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{1}{7} \cdot \frac{- 1}{7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.4

Moltiplica $\frac{1}{7}$ per $\frac{- 1}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{- 1}{7 \cdot 7}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} + \frac{- 1}{49}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.1.6

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (0 - \frac{1}{294} - \frac{1}{49}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.2

Sottrai $\frac{1}{294}$ da $0$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{294} - \frac{1}{49}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.3

Per scrivere $- \frac{1}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{6}{6}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{294} - \frac{1}{49} \cdot \frac{6}{6}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.4

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 4.5.4.1

Moltiplica $\frac{1}{49}$ per $\frac{6}{6}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{294} - \frac{6}{49 \cdot 6}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.4.2

Moltiplica $49$ per $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{294} - \frac{6}{294}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.5

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} \cdot \frac{- 1 - 6}{294} - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.6

Sottrai $6$ da $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} \cdot \frac{- 7}{294} - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.7

Elimina il fattore comune di $- 7$ e $294$ .

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Passaggio 4.5.7.1

Scomponi $7$ da $- 7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} \cdot \frac{7 (- 1)}{294} - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.7.2

Elimina i fattori comuni.

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Passaggio 4.5.7.2.1

Scomponi $7$ da $294$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} \cdot \frac{7 \cdot - 1}{7 \cdot 42} - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.7.2.2

Elimina il fattore comune.

Passaggio 4.5.7.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} \cdot \frac{- 1}{42} - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 4.5.8

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} | \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 5

Calcola $| \begin{array}{c} - \frac{9}{7} & \frac{1}{7} & - \frac{3}{7} \\ \frac{40}{21} & - \frac{2}{7} & \frac{11}{21} \\ - \frac{47}{7} & \frac{6}{7} & - \frac{18}{7} \end{array} |$ .

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Passaggio 5.1

Choose the row or column with the most $0$ elements. If there are no $0$ elements choose any row or column. Multiply every element in row $1$ by its cofactor and add.

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Passaggio 5.1.1

Consider the corresponding sign chart.

$| \begin{array}{c} + & - & + \\ - & + & - \\ + & - & + \end{array} |$

Passaggio 5.1.2

The cofactor is the minor with the sign changed if the indices match a $-$ position on the sign chart.

Passaggio 5.1.3

The minor for $a_{11}$ is the determinant with row $1$ and column $1$ deleted.

$| \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 5.1.4

Multiply element $a_{11}$ by its cofactor.

$- \frac{9}{7} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |$

Passaggio 5.1.5

The minor for $a_{12}$ is the determinant with row $1$ and column $2$ deleted.

$| \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |$

Passaggio 5.1.6

Multiply element $a_{12}$ by its cofactor.

$- \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |$

Passaggio 5.1.7

The minor for $a_{13}$ is the determinant with row $1$ and column $3$ deleted.

$| \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |$

Passaggio 5.1.8

Multiply element $a_{13}$ by its cofactor.

$- \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |$

Passaggio 5.1.9

Add the terms together.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} | \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} | - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2

Calcola $| \begin{array}{c} - \frac{2}{7} & \frac{11}{21} \\ \frac{6}{7} & - \frac{18}{7} \end{array} |$ .

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Passaggio 5.2.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (- \frac{2}{7} (- \frac{18}{7}) - \frac{6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2

Semplifica il determinante.

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Passaggio 5.2.2.1

Semplifica ciascun termine.

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Passaggio 5.2.2.1.1

Moltiplica $- \frac{2}{7} (- \frac{18}{7})$ .

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Passaggio 5.2.2.1.1.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (1 (\frac{2}{7}) \frac{18}{7} - \frac{6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.1.2

Moltiplica $\frac{2}{7}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{2}{7} \cdot \frac{18}{7} - \frac{6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.1.3

Moltiplica $\frac{2}{7}$ per $\frac{18}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{2 \cdot 18}{7 \cdot 7} - \frac{6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.1.4

Moltiplica $2$ per $18$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{7 \cdot 7} - \frac{6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.1.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} - \frac{6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.2

Elimina il fattore comune di $3$ .

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Passaggio 5.2.2.1.2.1

Sposta il negativo all'inizio di $- \frac{6}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{- 6}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.2.2

Scomponi $3$ da $- 6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{3 (- 2)}{7} \cdot \frac{11}{21}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.2.3

Scomponi $3$ da $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{3 \cdot - 2}{7} \cdot \frac{11}{3 \cdot 7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.2.4

Elimina il fattore comune.

Passaggio 5.2.2.1.2.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{- 2}{7} \cdot \frac{11}{7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.3

Moltiplica $\frac{- 2}{7}$ per $\frac{11}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{- 2 \cdot 11}{7 \cdot 7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.4

Moltiplica $- 2$ per $11$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{- 22}{7 \cdot 7}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} + \frac{- 22}{49}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.1.6

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} (\frac{36}{49} - \frac{22}{49}) - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{36 - 22}{49} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.3

Sottrai $22$ da $36$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{14}{49} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.4

Elimina il fattore comune di $14$ e $49$ .

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Passaggio 5.2.2.4.1

Scomponi $7$ da $14$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{7 (2)}{49} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.4.2

Elimina i fattori comuni.

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Passaggio 5.2.2.4.2.1

Scomponi $7$ da $49$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{7 \cdot 2}{7 \cdot 7} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.2.2.4.2.2

Elimina il fattore comune.

Passaggio 5.2.2.4.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} | \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} | - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3

Calcola $| \begin{array}{c} \frac{40}{21} & \frac{11}{21} \\ - \frac{47}{7} & - \frac{18}{7} \end{array} |$ .

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Passaggio 5.3.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{40}{21} (- \frac{18}{7}) - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2

Semplifica il determinante.

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Passaggio 5.3.2.1

Semplifica ciascun termine.

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Passaggio 5.3.2.1.1

Elimina il fattore comune di $3$ .

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Passaggio 5.3.2.1.1.1

Sposta il negativo all'inizio di $- \frac{18}{7}$ nel numeratore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{40}{21} \cdot \frac{- 18}{7} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.1.2

Scomponi $3$ da $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{40}{3 (7)} \cdot \frac{- 18}{7} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.1.3

Scomponi $3$ da $- 18$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{40}{3 \cdot 7} \cdot \frac{3 \cdot - 6}{7} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.1.4

Elimina il fattore comune.

Passaggio 5.3.2.1.1.5

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{40}{7} \cdot \frac{- 6}{7} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.2

Moltiplica $\frac{40}{7}$ per $\frac{- 6}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{40 \cdot - 6}{7 \cdot 7} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.3

Moltiplica $40$ per $- 6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{- 240}{7 \cdot 7} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (\frac{- 240}{49} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.5

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} - (- \frac{47}{7} \cdot \frac{11}{21})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.6

Moltiplica $- \frac{47}{7} \cdot \frac{11}{21}$ .

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Passaggio 5.3.2.1.6.1

Moltiplica $\frac{11}{21}$ per $\frac{47}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} - - \frac{11 \cdot 47}{21 \cdot 7}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.6.2

Moltiplica $11$ per $47$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} - - \frac{517}{21 \cdot 7}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.6.3

Moltiplica $21$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} - - \frac{517}{147}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.7

Moltiplica $- - \frac{517}{147}$ .

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Passaggio 5.3.2.1.7.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} + 1 (\frac{517}{147})) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.1.7.2

Moltiplica $\frac{517}{147}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} + \frac{517}{147}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.2

Per scrivere $- \frac{240}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{3}{3}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240}{49} \cdot \frac{3}{3} + \frac{517}{147}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.3

Scrivi ogni espressione con un comune denominatore di $147$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 5.3.2.3.1

Moltiplica $\frac{240}{49}$ per $\frac{3}{3}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240 \cdot 3}{49 \cdot 3} + \frac{517}{147}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.3.2

Moltiplica $49$ per $3$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{240 \cdot 3}{147} + \frac{517}{147}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.4

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} \cdot \frac{- 240 \cdot 3 + 517}{147} - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.5

Semplifica il numeratore.

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Passaggio 5.3.2.5.1

Moltiplica $- 240$ per $3$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} \cdot \frac{- 720 + 517}{147} - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.5.2

Somma $- 720$ e $517$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} \cdot \frac{- 203}{147} - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.6

Elimina il fattore comune di $- 203$ e $147$ .

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Passaggio 5.3.2.6.1

Scomponi $7$ da $- 203$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} \cdot \frac{7 (- 29)}{147} - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.6.2

Elimina i fattori comuni.

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Passaggio 5.3.2.6.2.1

Scomponi $7$ da $147$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} \cdot \frac{7 \cdot - 29}{7 \cdot 21} - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.6.2.2

Elimina il fattore comune.

Passaggio 5.3.2.6.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} \cdot \frac{- 29}{21} - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.3.2.7

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} | \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |)$

Passaggio 5.4

Calcola $| \begin{array}{c} \frac{40}{21} & - \frac{2}{7} \\ - \frac{47}{7} & \frac{6}{7} \end{array} |$ .

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Passaggio 5.4.1

È possibile trovare il determinante di una matrice $2 \times 2$ usando la formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{40}{21} \cdot \frac{6}{7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2

Semplifica il determinante.

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Passaggio 5.4.2.1

Semplifica ciascun termine.

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Passaggio 5.4.2.1.1

Elimina il fattore comune di $3$ .

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Passaggio 5.4.2.1.1.1

Scomponi $3$ da $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{40}{3 (7)} \cdot \frac{6}{7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.1.2

Scomponi $3$ da $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{40}{3 \cdot 7} \cdot \frac{3 \cdot 2}{7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.1.3

Elimina il fattore comune.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{40}{3 \cdot 7} \cdot \frac{3 \cdot 2}{7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.1.4

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{40}{7} \cdot \frac{2}{7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.2

Moltiplica $\frac{40}{7}$ per $\frac{2}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{40 \cdot 2}{7 \cdot 7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.3

Moltiplica $40$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{80}{7 \cdot 7} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.4

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{80}{49} - (- \frac{47}{7} (- \frac{2}{7}))))$

Passaggio 5.4.2.1.5

Moltiplica $- \frac{47}{7} (- \frac{2}{7})$ .

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Passaggio 5.4.2.1.5.1

Moltiplica $- 1$ per $- 1$ .

Passaggio 5.4.2.1.5.2

Moltiplica $\frac{47}{7}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{9}{7} \cdot \frac{2}{7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (\frac{80}{49} - (\frac{47}{7} \cdot \frac{2}{7})))$

Passaggio 5.4.2.1.5.3

Moltiplica $\frac{47}{7}$ per $\frac{2}{7}$ .

Passaggio 5.4.2.1.5.4

Moltiplica $47$ per $2$ .

Passaggio 5.4.2.1.5.5

Moltiplica $7$ per $7$ .

Passaggio 5.4.2.2

Riduci i numeratori su un comune denominatore.

Passaggio 5.4.2.3

Sottrai $94$ da $80$ .

Passaggio 5.4.2.4

Elimina il fattore comune di $- 14$ e $49$ .

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Passaggio 5.4.2.4.1

Scomponi $7$ da $- 14$ .

Passaggio 5.4.2.4.2

Elimina i fattori comuni.

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Passaggio 5.4.2.4.2.1

Scomponi $7$ da $49$ .

Passaggio 5.4.2.4.2.2

Elimina il fattore comune.

Passaggio 5.4.2.4.2.3

Riscrivi l'espressione.

Passaggio 5.4.2.5

Sposta il negativo davanti alla frazione.

Passaggio 5.5

Semplifica il determinante.

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Passaggio 5.5.1

Semplifica ciascun termine.

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Passaggio 5.5.1.1

Moltiplica $- \frac{9}{7} \cdot \frac{2}{7}$ .

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Passaggio 5.5.1.1.1

Moltiplica $\frac{2}{7}$ per $\frac{9}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{2 \cdot 9}{7 \cdot 7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.1.2

Moltiplica $2$ per $9$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{7 \cdot 7} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.1.3

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} - \frac{1}{7} (- \frac{29}{21}) - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.2

Moltiplica $- \frac{1}{7} (- \frac{29}{21})$ .

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Passaggio 5.5.1.2.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + 1 (\frac{1}{7}) \frac{29}{21} - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.2.2

Moltiplica $\frac{1}{7}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{1}{7} \cdot \frac{29}{21} - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.2.3

Moltiplica $\frac{1}{7}$ per $\frac{29}{21}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{7 \cdot 21} - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.2.4

Moltiplica $7$ per $21$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{147} - \frac{3}{7} (- \frac{2}{7}))$

Passaggio 5.5.1.3

Moltiplica $- \frac{3}{7} (- \frac{2}{7})$ .

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Passaggio 5.5.1.3.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{147} + 1 (\frac{3}{7}) \frac{2}{7})$

Passaggio 5.5.1.3.2

Moltiplica $\frac{3}{7}$ per $1$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{147} + \frac{3}{7} \cdot \frac{2}{7})$

Passaggio 5.5.1.3.3

Moltiplica $\frac{3}{7}$ per $\frac{2}{7}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{147} + \frac{3 \cdot 2}{7 \cdot 7})$

Passaggio 5.5.1.3.4

Moltiplica $3$ per $2$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{147} + \frac{6}{7 \cdot 7})$

Passaggio 5.5.1.3.5

Moltiplica $7$ per $7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{18}{49} + \frac{29}{147} + \frac{6}{49})$

Passaggio 5.5.2

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (\frac{- 18 + 6}{49} + \frac{29}{147})$

Passaggio 5.5.3

Somma $- 18$ e $6$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (\frac{- 12}{49} + \frac{29}{147})$

Passaggio 5.5.4

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{12}{49} + \frac{29}{147})$

Passaggio 5.5.5

Per scrivere $- \frac{12}{49}$ come una frazione con un comune denominatore, moltiplicala per $\frac{3}{3}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{12}{49} \cdot \frac{3}{3} + \frac{29}{147})$

Passaggio 5.5.6

Scrivi ogni espressione con un comune denominatore di $147$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 5.5.6.1

Moltiplica $\frac{12}{49}$ per $\frac{3}{3}$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{12 \cdot 3}{49 \cdot 3} + \frac{29}{147})$

Passaggio 5.5.6.2

Moltiplica $49$ per $3$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{12 \cdot 3}{147} + \frac{29}{147})$

Passaggio 5.5.7

Riduci i numeratori su un comune denominatore.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{- 12 \cdot 3 + 29}{147}$

Passaggio 5.5.8

Semplifica il numeratore.

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Passaggio 5.5.8.1

Moltiplica $- 12$ per $3$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{- 36 + 29}{147}$

Passaggio 5.5.8.2

Somma $- 36$ e $29$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{- 7}{147}$

Passaggio 5.5.9

Elimina il fattore comune di $- 7$ e $147$ .

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Passaggio 5.5.9.1

Scomponi $7$ da $- 7$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{7 (- 1)}{147}$

Passaggio 5.5.9.2

Elimina i fattori comuni.

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Passaggio 5.5.9.2.1

Scomponi $7$ da $147$ .

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{7 \cdot - 1}{7 \cdot 21}$

Passaggio 5.5.9.2.2

Elimina il fattore comune.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{7 \cdot - 1}{7 \cdot 21}$

Passaggio 5.5.9.2.3

Riscrivi l'espressione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} \cdot \frac{- 1}{21}$

Passaggio 5.5.10

Sposta il negativo davanti alla frazione.

$- \frac{4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6

Semplifica il determinante.

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Passaggio 6.1

Semplifica ciascun termine.

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Passaggio 6.1.1

Elimina il fattore comune di $2$ .

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Passaggio 6.1.1.1

Sposta il negativo all'inizio di $- \frac{4}{7}$ nel numeratore.

$\frac{- 4}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.1.2

Scomponi $2$ da $- 4$ .

$\frac{2 (- 2)}{7} \cdot \frac{1}{42} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.1.3

Scomponi $2$ da $42$ .

$\frac{2 \cdot - 2}{7} \cdot \frac{1}{2 \cdot 21} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.1.4

Elimina il fattore comune.

$\frac{2 \cdot - 2}{7} \cdot \frac{1}{2 \cdot 21} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.1.5

Riscrivi l'espressione.

$\frac{- 2}{7} \cdot \frac{1}{21} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.2

Moltiplica $\frac{- 2}{7}$ per $\frac{1}{21}$ .

$\frac{- 2}{7 \cdot 21} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.3

Moltiplica $7$ per $21$ .

$\frac{- 2}{147} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.4

Sposta il negativo davanti alla frazione.

$- \frac{2}{147} - \frac{2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.5

Elimina il fattore comune di $2$ .

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Passaggio 6.1.5.1

Sposta il negativo all'inizio di $- \frac{2}{7}$ nel numeratore.

$- \frac{2}{147} + \frac{- 2}{7} (- \frac{5}{42}) + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.5.2

Sposta il negativo all'inizio di $- \frac{5}{42}$ nel numeratore.

$- \frac{2}{147} + \frac{- 2}{7} \cdot \frac{- 5}{42} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.5.3

Scomponi $2$ da $- 2$ .

$- \frac{2}{147} + \frac{2 (- 1)}{7} \cdot \frac{- 5}{42} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.5.4

Scomponi $2$ da $42$ .

$- \frac{2}{147} + \frac{2 \cdot - 1}{7} \cdot \frac{- 5}{2 \cdot 21} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.5.5

Elimina il fattore comune.

$- \frac{2}{147} + \frac{2 \cdot - 1}{7} \cdot \frac{- 5}{2 \cdot 21} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.5.6

Riscrivi l'espressione.

$- \frac{2}{147} + \frac{- 1}{7} \cdot \frac{- 5}{21} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.6

Moltiplica $\frac{- 1}{7}$ per $\frac{- 5}{21}$ .

$- \frac{2}{147} + \frac{- - 5}{7 \cdot 21} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.7

Moltiplica $- 1$ per $- 5$ .

$- \frac{2}{147} + \frac{5}{7 \cdot 21} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.8

Moltiplica $7$ per $21$ .

$- \frac{2}{147} + \frac{5}{147} + \frac{1}{7} (- \frac{1}{42}) - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.9

Moltiplica $\frac{1}{7} (- \frac{1}{42})$ .

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Passaggio 6.1.9.1

Moltiplica $\frac{1}{7}$ per $\frac{1}{42}$ .

$- \frac{2}{147} + \frac{5}{147} - \frac{1}{7 \cdot 42} - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.9.2

Moltiplica $7$ per $42$ .

$- \frac{2}{147} + \frac{5}{147} - \frac{1}{294} - \frac{1}{7} (- \frac{1}{21})$

Passaggio 6.1.10

Moltiplica $- \frac{1}{7} (- \frac{1}{21})$ .

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Passaggio 6.1.10.1

Moltiplica $- 1$ per $- 1$ .

$- \frac{2}{147} + \frac{5}{147} - \frac{1}{294} + 1 (\frac{1}{7}) \frac{1}{21}$

Passaggio 6.1.10.2

Moltiplica $\frac{1}{7}$ per $1$ .

$- \frac{2}{147} + \frac{5}{147} - \frac{1}{294} + \frac{1}{7} \cdot \frac{1}{21}$

Passaggio 6.1.10.3

Moltiplica $\frac{1}{7}$ per $\frac{1}{21}$ .

$- \frac{2}{147} + \frac{5}{147} - \frac{1}{294} + \frac{1}{7 \cdot 21}$

Passaggio 6.1.10.4

Moltiplica $7$ per $21$ .

$- \frac{2}{147} + \frac{5}{147} - \frac{1}{294} + \frac{1}{147}$

Passaggio 6.2

Riduci i numeratori su un comune denominatore.

$\frac{- 2 + 5 + 1}{147} + \frac{- 1}{294}$

Passaggio 6.3

Somma $- 2$ e $5$ .

$\frac{3 + 1}{147} + \frac{- 1}{294}$

Passaggio 6.4

Somma $3$ e $1$ .

$\frac{4}{147} + \frac{- 1}{294}$

Passaggio 6.5

Sposta il negativo davanti alla frazione.

$\frac{4}{147} - \frac{1}{294}$

Passaggio 6.6

Per scrivere $\frac{4}{147}$ come una frazione con un comune denominatore, moltiplicala per $\frac{2}{2}$ .

$\frac{4}{147} \cdot \frac{2}{2} - \frac{1}{294}$

Passaggio 6.7

Scrivi ogni espressione con un comune denominatore di $294$ , moltiplicando ciascuna per il fattore appropriato di $1$ .

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Passaggio 6.7.1

Moltiplica $\frac{4}{147}$ per $\frac{2}{2}$ .

$\frac{4 \cdot 2}{147 \cdot 2} - \frac{1}{294}$

Passaggio 6.7.2

Moltiplica $147$ per $2$ .

$\frac{4 \cdot 2}{294} - \frac{1}{294}$

Passaggio 6.8

Riduci i numeratori su un comune denominatore.

$\frac{4 \cdot 2 - 1}{294}$

Passaggio 6.9

Semplifica il numeratore.

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Passaggio 6.9.1

Moltiplica $4$ per $2$ .

$\frac{8 - 1}{294}$

Passaggio 6.9.2

Sottrai $1$ da $8$ .

$\frac{7}{294}$

Passaggio 6.10

Elimina il fattore comune di $7$ e $294$ .

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Passaggio 6.10.1

Scomponi $7$ da $7$ .

$\frac{7 (1)}{294}$

Passaggio 6.10.2

Elimina i fattori comuni.

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Passaggio 6.10.2.1

Scomponi $7$ da $294$ .

$\frac{7 \cdot 1}{7 \cdot 42}$

Passaggio 6.10.2.2

Elimina il fattore comune.

$\frac{7 \cdot 1}{7 \cdot 42}$

Passaggio 6.10.2.3

Riscrivi l'espressione.

$\frac{1}{42}$