Hi! I'm really confused on how to do this. Can someone help me? Thanks a bunch!
Directions: Use the vectors u = <2, 2>, v = <-3, 4> and w = <1, -2> to find the indicated quantity.
a. 3u ∙ v
b. (u ∙ 2v)w
3u ∙ v
= <6,6> ∙ <-3,4>
= -18 + 24
= 6
(u ∙ 2v)w
= ( <2,2> ∙ <-6,8>)<1,-2>
= (-12 + 16)<1,-2>
= 4<1,-2>= <4,-8>