Question

Sendo: A= $\left[\begin{array}{ccc}1&2&1\\3&1&2\end{array}\right]$ e B= $\left[\begin{array}{ccc}1&2\\2&1\\3&1\end{array}\right]$ , Obtenha A.B                             R: $\left[\begin{array}{ccc}8&5\\11&9\end{array}\right]$

Answer 1

$Ola~~~\mathbf{Jimine} \\ \\ A.B \\ \\ \begin{bmatrix}1&2&1 \\ 3&1&2\end{bmatrix}.\begin{bmatrix}1&2 \\ 2&1 \\ 3&1\end{bmatrix} \\ \\ \\ \begin{bmatrix}1+4+3&2+2+1 \\ 3+2+6&6+1+2\end{bmatrix} \\ \\ \\ \boxed{A.B=\begin{bmatrix}8&5 \\ 11&9\end{bmatrix}}\\ \\ \\ \mathbb{iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii}\\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Espero~ter~ajudado!!$