Question

Calcule o determinante das matrizes abaixo:$A=\left[\begin{array}{ccc}3&-1&\\\\-1&4&\\\end{array}\right]$$B=\left[\begin{array}{ccc}1&0&1\\3&0&8\\1&2&5\end{array}\right]$

Answer 1

Resposta:

Explicação passo-a-passo:

$A=(3 \times 4)-(-1 \times -1)\\A=12-1\\A=11\\\\B=(1*0*5)+(0*8*1)+(1*3*2)-(0*3*5)-(1*8*2)-(1*0*1)\\B=6-16\\B=-10$