Question

O determinante da matriz A (-2 1 0 2 3 4 5 1 2) é igual a:
a.det(a) = 4
b.det(a) = 8
c.det(a) = -4
d.det(a) = -12
e. det(a)= +12. d.

Answer 1

|-2 1 0 -2 1|

Det (A) = |2 3 4 2 3|

|5 1 2 5 1|

Det (A) = -2.3.2 + 1.4.5 + 0.2.1 - 5.3.0 - 1.4.(-2) - 2.2.1

Det (A) = -12 + 20 + 0 - 0 + 8 - 4

Det (A) = 12

Answer 2

Resposta: (E) Det (A) = 12