Question

Se possível, encontre as inversas das matrizes ( 1 1 1 ; 3 2 -1; 2 2 1) ​

Answer 1

Resposta:

$-M=\left[\begin{array}{ccc}-1&-1&-1\\-3&-2&1\\-2&-2&-1\end{array}\right]$

Explicação passo a passo:

Tendo

$M=\left[\begin{array}{ccc}1&1&1\\3&2&-1\\2&2&1\end{array}\right]$,

$-M=\left[\begin{array}{ccc}(1\times-1)&(1\times-1)&(1\times-1)\\(3\times-1)&(2\times-1)&(-1\times-1)\\(2\times-1)&(2\times-1)&(1\times-1)\end{array}\right]$

$-M=\left[\begin{array}{ccc}-1&-1&-1\\-3&-2&1\\-2&-2&-2\end{array}\right]$.

Espero ter ajudado :)