Álgebra linear Exemplos

$[\begin{array}{c} 12 \\ 3 \\ - 9 \end{array}]$

Etapa 1

Write as an augmented matrix for $A x = 0$ .

$[\begin{array}{c} 12 & 0 \\ 3 & 0 \\ - 9 & 0 \end{array}]$

Etapa 2

Encontre a forma escalonada reduzida por linhas.

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Etapa 2.1

Multiply each element of $R_{1}$ by $\frac{1}{12}$ to make the entry at $1, 1$ a $1$ .

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Etapa 2.1.1

Multiply each element of $R_{1}$ by $\frac{1}{12}$ to make the entry at $1, 1$ a $1$ .

$[\begin{array}{c} \frac{12}{12} & \frac{0}{12} \\ 3 & 0 \\ - 9 & 0 \end{array}]$

Etapa 2.1.2

Simplifique $R_{1}$ .

$[\begin{array}{c} 1 & 0 \\ 3 & 0 \\ - 9 & 0 \end{array}]$

Etapa 2.2

Perform the row operation $R_{2} = R_{2} - 3 R_{1}$ to make the entry at $2, 1$ a $0$ .

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Etapa 2.2.1

Perform the row operation $R_{2} = R_{2} - 3 R_{1}$ to make the entry at $2, 1$ a $0$ .

$[\begin{array}{c} 1 & 0 \\ 3 - 3 \cdot 1 & 0 - 3 \cdot 0 \\ - 9 & 0 \end{array}]$

Etapa 2.2.2

Simplifique $R_{2}$ .

$[\begin{array}{c} 1 & 0 \\ 0 & 0 \\ - 9 & 0 \end{array}]$

Etapa 2.3

Perform the row operation $R_{3} = R_{3} + 9 R_{1}$ to make the entry at $3, 1$ a $0$ .

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Etapa 2.3.1

Perform the row operation $R_{3} = R_{3} + 9 R_{1}$ to make the entry at $3, 1$ a $0$ .

$[\begin{array}{c} 1 & 0 \\ 0 & 0 \\ - 9 + 9 \cdot 1 & 0 + 9 \cdot 0 \end{array}]$

Etapa 2.3.2

Simplifique $R_{3}$ .

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

Etapa 3

Use the result matrix to declare the final solution to the system of equations.

$x = 0$

$0 = 0$

Etapa 4

Write a solution vector by solving in terms of the free variables in each row.

$[\begin{array}{c} x \end{array}] = [\begin{array}{c} 0 \end{array}]$

Etapa 5

Write as a solution set.

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