Álgebra linear Exemplos

$[\begin{array}{c} 2 & 2 & k \end{array}] \cdot ([\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 1

Reescreva usando a propriedade comutativa da multiplicação.

$1 [\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 2

Multiplique $1$ por cada elemento da matriz.

$[\begin{array}{c} 1 \cdot 1 & 1 \cdot 1 & 1 \cdot 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3

Simplifique cada elemento da matriz.

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Etapa 3.1

Multiplique $1$ por $1$ .

$[\begin{array}{c} 1 & 1 \cdot 1 & 1 \cdot 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.2

Multiplique $1$ por $1$ .

$[\begin{array}{c} 1 & 1 & 1 \cdot 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.3

Multiplique $0$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.4

Multiplique $1$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.5

Multiplique $0$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.6

Multiplique $2$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.7

Multiplique $0$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.8

Multiplique $2$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & 1 \cdot - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 3.9

Multiplique $- 1$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] \cdot 1 [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 4

Mova $1$ para a esquerda de $[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}]$ .

$1 \cdot [\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 5

Multiplique $1$ por cada elemento da matriz.

$[\begin{array}{c} 1 \cdot 1 & 1 \cdot 1 & 1 \cdot 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6

Simplifique cada elemento da matriz.

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Etapa 6.1

Multiplique $1$ por $1$ .

$[\begin{array}{c} 1 & 1 \cdot 1 & 1 \cdot 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.2

Multiplique $1$ por $1$ .

$[\begin{array}{c} 1 & 1 & 1 \cdot 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.3

Multiplique $0$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 \cdot 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.4

Multiplique $1$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 1 \cdot 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.5

Multiplique $0$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 1 \cdot 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.6

Multiplique $2$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 1 \cdot 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.7

Multiplique $0$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 1 \cdot 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.8

Multiplique $2$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & 1 \cdot - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 6.9

Multiplique $- 1$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] (1 [\begin{array}{c} 2 \\ 2 \\ k \end{array}])$

Etapa 7

Multiplique $1$ por cada elemento da matriz.

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] [\begin{array}{c} 1 \cdot 2 \\ 1 \cdot 2 \\ 1 k \end{array}]$

Etapa 8

Simplifique cada elemento da matriz.

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Etapa 8.1

Multiplique $2$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] [\begin{array}{c} 2 \\ 1 \cdot 2 \\ 1 k \end{array}]$

Etapa 8.2

Multiplique $2$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] [\begin{array}{c} 2 \\ 2 \\ 1 k \end{array}]$

Etapa 8.3

Multiplique $k$ por $1$ .

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] [\begin{array}{c} 2 \\ 2 \\ k \end{array}]$

Etapa 9

Multiplique $[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 & 2 & k \end{array}] [\begin{array}{c} 2 \\ 2 \\ k \end{array}]$ .

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Etapa 9.1

Two matrices can be multiplied if and only if the number of columns in the first matrix is equal to the number of rows in the second matrix. In this case, the first matrix is $3 \times 1$ and the second matrix is $1 \times 3$ .

Etapa 9.2

Multiplique cada linha na primeira matriz por cada coluna na segunda matriz.

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 \cdot 2 & 2 \cdot 2 & 2 k \\ 2 \cdot 2 & 2 \cdot 2 & 2 k \\ k \cdot 2 & k \cdot 2 & k \cdot k \end{array}]$

Etapa 9.3

Simplifique cada elemento da matriz multiplicando todas as expressões.

$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 4 & 4 & 2 k \\ 4 & 4 & 2 k \\ 2 k & 2 k & k^{2} \end{array}]$

Etapa 9.4

Two matrices can be multiplied if and only if the number of columns in the first matrix is equal to the number of rows in the second matrix. In this case, the first matrix is $3 \times 3$ and the second matrix is $3 \times 3$ .

Etapa 9.5

Multiplique cada linha na primeira matriz por cada coluna na segunda matriz.

$[\begin{array}{c} 1 \cdot 4 + 1 \cdot 4 + 0 (2 k) & 1 \cdot 4 + 1 \cdot 4 + 0 (2 k) & 1 (2 k) + 1 (2 k) + 0 k^{2} \\ 1 \cdot 4 + 0 \cdot 4 + 2 (2 k) & 1 \cdot 4 + 0 \cdot 4 + 2 (2 k) & 1 (2 k) + 0 (2 k) + 2 k^{2} \\ 0 \cdot 4 + 2 \cdot 4 - (2 k) & 0 \cdot 4 + 2 \cdot 4 - (2 k) & 0 (2 k) + 2 (2 k) - k^{2} \end{array}]$

Etapa 9.6

Simplifique cada elemento da matriz multiplicando todas as expressões.

$[\begin{array}{c} 8 & 8 & 4 k \\ 4 + 4 k & 4 + 4 k & 2 k + 2 k^{2} \\ 8 - 2 k & 8 - 2 k & 4 k - k^{2} \end{array}]$