Question

Evaluate the expression:

v ⋅ w

Given the vectors:

r = <5, -5, -2>; v = <2, -8, -8>; w = <-2, 6, -5>

Answer 1

This is the dot product of the vectors v and w.
The dot product is defined as:
if v = (v1,v2,v3) and w=(w1,w2,w3) then v ⋅ w = v1w1+v2w2+v3w3.
Just substitute the numbers to see what will come out...

Answer 2

So the answer would be -12?

Answer 3

2*-2+-8*6+-8*-5=-4-48+40=-12, yes you are right!

Answer 4

Thank you so much! :)

Answer 5

yw!