Question

Calcule os determinantes das matrizes abaixo:

a) A= | 3 2 | b) B= | -7 5 |
| -5 -1 | | 2 -8 |

c) C= | 6 -4 | d) D= | 6 2 3 |
| -3 7 | | -3 -4 1 |
| -1 5 2 |​

Answer 1

Resposta:

Explicação passo-a-passo:

Oi Evelyn tudo bom?

A) $\left[\begin{array}{ccc}3&2\\5&-1\\\end{array}\right] =\\3.(-1) - 5.2 = \\-3 - 10 = -13$

B) $\left[\begin{array}{ccc}-7&5\\2&-8\\\end{array}\right] \\-7(-8) - 2.5 =\\56 - 10 = 46$

C) $\left[\begin{array}{ccc}6&-4\\-3&7\\\end{array}\right]=\\6.7 - (-3)(-4) = \\42 - 12 = 30$

D) $\left[\begin{array}{ccc}6&2&3\\-3&-4&1\\-1&5&2\end{array}\right] =\\6*(-4)*2+2*1*(-1)+3*(-3)*5-(-1)*(-4)*3-5*1*6-2*(-3)*2=-125$

Espero ter ajudado!! ;3