Question

preciso de ajuda urgente nessa, por favor​

Answer 1

Resposta:

a) 13

b) -1

c) 81

d) 0

Explicação passo-a-passo:

a)

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

b)

$\left[\begin{array}{cc}2&3\\3&4\end{array}\right] = 2 . 4 - (3 .3)\\\\\\det B = 8 - 9 \\\\det B = -1$

c)

$\left[\begin{array}{ccc}1&2&3\\5&9&4\\0&8&7\end{array}\right] = (1.9.7 + 5.8.3 + 0.2.4) - (3.9.0 + 4.8.1 + 7.2.5)\\\\det C = (63 + 120 + 0) - (0 + 32 + 70)\\\\det C = 183 - 102\\\\det C = 81$

d)

$\left[\begin{array}{ccc}-4&1&2\\2&0&-1\\-6&2&3\end{array}\right] = (-4.0.3 + 2.2.2 + -6.1.-1) - (2.0.-6 + -1.2.-4 + 3.1.2)\\\\det D = (0 + 8 + 6) - (0 + 8 + 6)\\\\det D = 14 - 14\\\\det D = 0$

Answer 2

Resposta:

Explicação passo-a-passo:

A) D = 13

B) D = -1

C) D = 81

D) D = 0

valeu?