Question

Por favor preciso de ajuda!
Com resolução.

Considerando as matrizes acima, calcule B.A

Answer 1

$B\cdot A= \left[\begin{array}{ccc}2&1\\0&1\end{array}\right]\cdot \left[\begin{array}{ccc}1&0\\2&1\end{array}\right]\\ \\ \\ B\cdot A= \left[\begin{array}{ccc}2\cdot 1+1\cdot 2&2\cdot0+1\cdot 1\\0\cdot1+1\cdot2&0\cdot0+1\cdot1\end{array}\right]\\ \\ \\ B\cdot A= \left[\begin{array}{ccc}4&1\\2&1\end{array}\right]$