Question

Qual o valor do determinante?
$\left[\begin{array}{ccc}1&3&10\\8&4&80\\1&0&-25\end{array}\right]$
Escolha uma:
a. 600
b. 700
c. 500
d. 850

Answer 1

$A=\begin{vmatrix}1&3&10\\8&4&80\\1&0&-25\end{vmatrix}$

$\mathsf{det\,A=1(-100)-3(-200-80)+10(-4))}$

$\mathsf{det\,A=-100+840-40=700}$