Question

Sendo u=(2,3), v=(-1,4) e w=(-2,-1), determine:
a) u + 2v
b) -u
c) u - v
d) 3u - 2v + w
e) -u -v + 2w

Answer 1

A) (2,3) + 2 ( -1,4) = (2,3) + (-2,8) = (0,11)

B) -(2,3) = (-2,-3)

C) (2,3) - (-1,4) = (3, -1)

D) 3(2,3) - 2(-1,4) + (-2,-1) = (6,9) - (-2,8) + (-2,-1) = (6,0)

E) -(2,3) - (-1,4) + 2(-2,1) = (-2,-3) + (1,-4) + (-4,2) = (-5,-5)