Question

Sendo v = (2, 3, 4) e w = (-2, 1, -4), calcule 2v - 3w =
(a) (10, 3, 20)
(b) (10, 9, 20)
(c) (4, 6, 8)
(d) (2, 3, 4)
(e) (-2, 3, -4)

Answer 1

Resposta:

Dados:

$v = (2, 3, 4);\\w = (-2, 1, -4).$

Temos:

$2v - 3w = 2(2, 3, 4) - 3(-2, 1, -4) = (4, 6, 8) - (-6, 3, -12) = (10, 3, 20).$

Item A.