Question

Considerando os vetores u = (1, -1, 4), v = (3, 5, -3) e w = (1, -2, 1) e as propriedades de espaços vetoriais, assinale a alternativa correspondente ao vetor x, tal que, x = 4.(u + v) - 2w.


Alternativas:


a)

X = (4, 2, 2)


b)

X = (14, 20, 2)


c)

X = (10, 10, 2)


d)

X = (8, 10, 2)


e)

X = (9, 15, 3)

Answer 1

u = (1, -1, 4), v = (3, 5, -3) e w = (1, -2, 1)

u+v = (4,4,1) 
4u= (16,16,4)
2w = (2,-4,2)

x=4u-2w
X= (14,20,2)
resposta = B