Matemática discreta Exemplos

$[\begin{array}{c} 2 & 2 & 6 \\ - 9 & 1 & 4 \\ 1 & 2 & 2 \end{array}]$

Etapa 1

Multiply each element of $R_{1}$ by $\frac{1}{2}$ to make the entry at $1, 1$ a $1$ .

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Etapa 1.1

Multiply each element of $R_{1}$ by $\frac{1}{2}$ to make the entry at $1, 1$ a $1$ .

$[\begin{array}{c} \frac{2}{2} & \frac{2}{2} & \frac{6}{2} \\ - 9 & 1 & 4 \\ 1 & 2 & 2 \end{array}]$

Etapa 1.2

Simplifique $R_{1}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ - 9 & 1 & 4 \\ 1 & 2 & 2 \end{array}]$

Etapa 2

Perform the row operation $R_{2} = R_{2} + 9 R_{1}$ to make the entry at $2, 1$ a $0$ .

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Etapa 2.1

Perform the row operation $R_{2} = R_{2} + 9 R_{1}$ to make the entry at $2, 1$ a $0$ .

$[\begin{array}{c} 1 & 1 & 3 \\ - 9 + 9 \cdot 1 & 1 + 9 \cdot 1 & 4 + 9 \cdot 3 \\ 1 & 2 & 2 \end{array}]$

Etapa 2.2

Simplifique $R_{2}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 10 & 31 \\ 1 & 2 & 2 \end{array}]$

Etapa 3

Perform the row operation $R_{3} = R_{3} - R_{1}$ to make the entry at $3, 1$ a $0$ .

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Etapa 3.1

Perform the row operation $R_{3} = R_{3} - R_{1}$ to make the entry at $3, 1$ a $0$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 10 & 31 \\ 1 - 1 & 2 - 1 & 2 - 3 \end{array}]$

Etapa 3.2

Simplifique $R_{3}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 10 & 31 \\ 0 & 1 & - 1 \end{array}]$

Etapa 4

Multiply each element of $R_{2}$ by $\frac{1}{10}$ to make the entry at $2, 2$ a $1$ .

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Etapa 4.1

Multiply each element of $R_{2}$ by $\frac{1}{10}$ to make the entry at $2, 2$ a $1$ .

$[\begin{array}{c} 1 & 1 & 3 \\ \frac{0}{10} & \frac{10}{10} & \frac{31}{10} \\ 0 & 1 & - 1 \end{array}]$

Etapa 4.2

Simplifique $R_{2}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 1 & \frac{31}{10} \\ 0 & 1 & - 1 \end{array}]$

Etapa 5

Perform the row operation $R_{3} = R_{3} - R_{2}$ to make the entry at $3, 2$ a $0$ .

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Etapa 5.1

Perform the row operation $R_{3} = R_{3} - R_{2}$ to make the entry at $3, 2$ a $0$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 1 & \frac{31}{10} \\ 0 - 0 & 1 - 1 & - 1 - \frac{31}{10} \end{array}]$

Etapa 5.2

Simplifique $R_{3}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 1 & \frac{31}{10} \\ 0 & 0 & - \frac{41}{10} \end{array}]$

Etapa 6

Multiply each element of $R_{3}$ by $- \frac{10}{41}$ to make the entry at $3, 3$ a $1$ .

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Etapa 6.1

Multiply each element of $R_{3}$ by $- \frac{10}{41}$ to make the entry at $3, 3$ a $1$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 1 & \frac{31}{10} \\ - \frac{10}{41} \cdot 0 & - \frac{10}{41} \cdot 0 & - \frac{10}{41} (- \frac{41}{10}) \end{array}]$

Etapa 6.2

Simplifique $R_{3}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 1 & \frac{31}{10} \\ 0 & 0 & 1 \end{array}]$

Etapa 7

Perform the row operation $R_{2} = R_{2} - \frac{31}{10} R_{3}$ to make the entry at $2, 3$ a $0$ .

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Etapa 7.1

Perform the row operation $R_{2} = R_{2} - \frac{31}{10} R_{3}$ to make the entry at $2, 3$ a $0$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 - \frac{31}{10} \cdot 0 & 1 - \frac{31}{10} \cdot 0 & \frac{31}{10} - \frac{31}{10} \cdot 1 \\ 0 & 0 & 1 \end{array}]$

Etapa 7.2

Simplifique $R_{2}$ .

$[\begin{array}{c} 1 & 1 & 3 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}]$

Etapa 8

Perform the row operation $R_{1} = R_{1} - 3 R_{3}$ to make the entry at $1, 3$ a $0$ .

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Etapa 8.1

Perform the row operation $R_{1} = R_{1} - 3 R_{3}$ to make the entry at $1, 3$ a $0$ .

$[\begin{array}{c} 1 - 3 \cdot 0 & 1 - 3 \cdot 0 & 3 - 3 \cdot 1 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}]$

Etapa 8.2

Simplifique $R_{1}$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}]$

Etapa 9

Perform the row operation $R_{1} = R_{1} - R_{2}$ to make the entry at $1, 2$ a $0$ .

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Etapa 9.1

Perform the row operation $R_{1} = R_{1} - R_{2}$ to make the entry at $1, 2$ a $0$ .

$[\begin{array}{c} 1 - 0 & 1 - 1 & 0 - 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}]$

Etapa 9.2

Simplifique $R_{1}$ .

$[\begin{array}{c} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}]$