Question

Resolva o determinante a matriz a seguir: $\left[\begin{array}{ccc}1&3&5\\2&6&9\\1&3&5\end{array}\right]$

a) det B = 60
b) det B = 25 
c) det B = 31
d) det B= 0

Answer 1

1.6.5(-)
3.9.1(-)
5.2.3(-)
1.6.5
3.9.1
5.2.3

-30-27-30+30+27+30 = 0

d) det B= 0