Question

Seja o vetor u = (7, 3, 5) e o vetor v = (-8, 4, 2). Calcule o escalar de u . v

Answer 1

u . v = (7 , 3 , 5) . (-8 , 4 , 2) = 7*(-8) + 3*4 + 5*2 = -56 + 12 + 10 = -34