Answer
$u(u·v)=⟨72,-36⟩$
It is a vector.
Work Step by Step
$u(u·v)=⟨-4,2⟩(⟨-4,2⟩⋅⟨5,1⟩)=⟨-4,2⟩[-4(5)+2(1)]=⟨-4,2⟩(-20+2)=⟨-4,2⟩(-18)=⟨-4(-18),2(-18)⟩=⟨72,-36⟩$
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: 77
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
