Question

Alguém pode resolver ?

Answer 1

(Multiplicação de matrizes linha X coluna)

1) $\left[\begin{array}{ccc}5&-3\\-1&4\end{array}\right] \left[\begin{array}{c}3&-2&\end{array}\right] = \left[\begin{array}{cc}15 + 6&-3 - 8 \end{array}\right] = \left[\begin{array}{cc}21&-11\end{array}\right]$

2) $\left[\begin{array}{cc \int\limits^a_b {x} \, dx }5&2\\-1&4\end{array}\right] \left[\begin{array}{cc}2&-1\\0&3\end{array}\right] = \left[\begin{array}{cc}10 + 0&-5 + 6\\-2 + 0 &1 + 12\end{array}\right] = \left[\begin{array}{cc \int\limits^a_b {x} \, dx }10&1\\-2&13\end{array}\right]$

3) $\left[\begin{array}{ccc}1&0&0\\1&1&0\\0&1&1\end{array}\right] \left[\begin{array}{ccc}2&2&1\\1&2&2\\2&1&2\end{array}\right] = \left[\begin{array}{ccc}2&2&1\\3&4&3\\3&3&4\end{array}\right]$