Question

MATRIZES

Clique na imagem abaixo:

Answer 1

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc}A*B = \\\\ \left(\begin{array}{ccc}2&-1\\-2&2\\0&1\end{array}\right) * \left(\begin{array}{ccc}-1&2&3\\2&1&1\end{array}\right) \\\\= \left(\begin{array}{ccc}-4&3&5\\6&-2&-4\\2&1&1 \end{array}\right) \to det(A*B) = 0\\\\N = 50+det(A*B)\\N = 50+0\\\\\boxed{\boxed{N=50}} \end{array}\right$

Espero ter ajudado. =^.^=