Question

sejam A = - 4312 e B 10 - 1 3 calcule o determinante das seguintes matrizes a) A b) B c) A + B d) A - B e) A + 2B f) A.B

Answer 1

$A=\left[\begin{array}{ccc}-4&3\\1&2\end{array}\right]$   $B=\left[\begin{array}{ccc}10&-13\end{array}\right]$

$a)det A= (-4)*2-3*1=-11$

$b)det ]B=\left[\begin{array}{ccc}10&-13\end{array}\right]$