Question

Calcule o determinante da matriz 3 2 1 /1 3 4/0 1 2

A)-3

B)0

C)1

D)3

E)2

Answer 1

Resposta:

D)3

Explicação passo-a-passo:

Matriz:

$\left[\begin{array}{ccc}3&2&1\\1&3&4\\0&1&2\end{array}\right]$$\left[\begin{array}{ccc}3&2\\1&3\\0&1\end{array}\right]$

Multiplique as diagonais:

3x3x2= 18

2x4x0= 0

1x1x1= 1

0x3x1= 0

1x4x3= 12

2x1x2= 4

18+0+1  ₋  0+12+4 = 19-16 = 3