Answer
$(u·v)v=⟨-90,-18⟩$
It is a vector.
Work Step by Step
$(u·v)v=(⟨-4,2⟩⋅⟨5,1⟩)⟨5,1⟩=[-4(5)+2(1)]⟨5,1⟩=(-20+2)⟨5,1⟩=(-18)⟨5,1⟩=⟨-18(5)),-18(1)⟩=⟨-90,-18⟩$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 8 - Review Exercises - Page 617: 78
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