Question

O valor de x que torna o determinante de (2 3 1)
(X 1 X)
(2 0 1)
a)4
b)3
c)2
d)1
e)0

Answer 1

|2 3 1| 2 3
|X 1 X| X 1
|2 0 1| 2 0


2 + 6x - 3x - 2

6x - 3x = 2 - 2
3x = 0
x = 0/3
x = 0



Alternativa e)