Question

Calcule os determinantes abaixo (clique no anexo) preciso da resposta urgenteeee

Answer 1

Resposta:

a) 20

b) 3

Explicação passo-a-passo:

a)  $\left[\begin{array}{cc}4&2\\6&8\\\end{array}\right]$ =

(4 × 8) - (2 × 6) = 20

b)  $\left[\begin{array}{ccc}1&2&3\\4&5&6\\-1&2&4\end{array}\right]$ =

(1 × 5 × 4) + (2 × 6 × ( - 1)) + (3 × 4 × 2) - (( - 1) × 5 × 3) - (2 × 6 × 1) - (4 × 4 × 2) = 3