Question

escreva a matriz A=(a i j) 2 x 2 em que a i j =3i-2j

Answer 1

Boa noite!


$\begin{bmatrix}a11&a12\\a21&a22\end{bmatrix}$
$\textup{a11}\rightarrow\textup{3}\times\textup{1-2}\times\textup{1}\rightarrow\textup{3-2}=\mathbf{1}$

$\textup{a12}\rightarrow\textup{3}\times\textup{1-2}\times\textup{2}\rightarrow\textup{3-4}=\mathbf{-1}$

$\textup{a21}\rightarrow\textup{3}\times\textup{2-2}\times\textup{1}\rightarrow\textup{6-2}=\mathbf{4}$

$\textup{a22}\rightarrow\textup{3}\times\textup{2-2}\times\textup{2}\rightarrow\textup{6-4}=\mathbf{2}$

$\begin{bmatrix}a11&a12\\a21&a22\end{bmatrix}$=$\begin{bmatrix}1&-1\\4&2\end{bmatrix}$

Att;Guilherme Lima