Question

me ajudem galera com matriz nao entendi muito essa:

$\begin{pmatrix}11\:&\:3\:\\ 7\:&\:11\end{pmatrix}\begin{pmatrix}8\:&\:0\:&\:1\:\\ 0\:&\:3\:&\:5\end{pmatrix}$

Answer 1

Olá,

$\mathrm{Multiplicar\:as\:filas\:da\:primeira\:matriz\:pelas\:colunas\:da\:segunda\:matriz}$

$\begin{pmatrix}11&3\end{pmatrix}\begin{pmatrix}8\\ 0\end{pmatrix}=11\cdot \:8+3\cdot \:0$
$\begin{pmatrix}11&3\end{pmatrix}\begin{pmatrix}0\\ 3\end{pmatrix}=11\cdot \:0+3\cdot \:3$
$\begin{pmatrix}11&3\end{pmatrix}\begin{pmatrix}1\\ 5\end{pmatrix}=11\cdot \:1+3\cdot \:5$
$\begin{pmatrix}7&11\end{pmatrix}\begin{pmatrix}8\\ 0\end{pmatrix}=7\cdot \:8+11\cdot \:0$
$\begin{pmatrix}7&11\end{pmatrix}\begin{pmatrix}0\\ 3\end{pmatrix}=7\cdot \:0+11\cdot \:3$
$\begin{pmatrix}7&11\end{pmatrix}\begin{pmatrix}1\\ 5\end{pmatrix}=7\cdot \:1+11\cdot \:5$

$=\begin{pmatrix}11\cdot \:8+3\cdot \:0&11\cdot \:0+3\cdot \:3&11\cdot \:1+3\cdot \:5\\ 7\cdot \:8+11\cdot \:0&7\cdot \:0+11\cdot \:3&7\cdot \:1+11\cdot \:5\end{pmatrix}$

$\mathrm{Simplificar\:cada\:elemento}$
$=\begin{pmatrix}88&9&26\\ 56&33&62\end{pmatrix}$