Question

vamos multiplica as matrizes

Answer 1

Resposta:

Resposta na explicação

Explicação passo-a-passo:

a)

$\left[\begin{array}{cc}2&5\end{array}\right] . \left[\begin{array}{c}4\\1\end{array}\right]=[(2 \times 4) +(5 \times1)]=[9]$

b)

$\left[\begin{array}{ccc}2&3&1\\4&0&1\end{array}\right] .\left[\begin{array}{cc}4&1\\2&-3\\1&5\end{array}\right] =\left[\begin{array}{cc}(2\times4)+(3\times2)+(1\times1)&(2\times1)+(3\times-3)+(1\times5)\\(4\times4)+(0\times2)+(1\times1)&(4\times1)+(0\times-3)+(1\times5)\end{array}\right]\\\left[\begin{array}{ccc}2&3&1\\4&0&1\end{array}\right] .\left[\begin{array}{cc}4&1\\2&-3\\1&5\end{array}\right] =\left[\begin{array}{ccc}15&-2\\17&9\end{array}\right]$