Question

SOCORRO Dadas as matrizes A e B determina o det (AB)


A= $\left[\begin{array}{ccc}5&2\\4&3\\\end{array}\right]$


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


a) -42

b)42

c)12

d)-12

Answer 1

Resposta:

Nenhuma das questões anteriores.

Explicação passo-a-passo:

detA=5.3-4.2=15-8=7

detB= -4.2+0.1= -8

det(AB)=detA.detB=7.(-8)= -56