Answer
$$2u\cdot(3u- v) =2.$$
Work Step by Step
We have
$$2u\cdot(3u- v)=6u\cdot u-2u\cdot v=6\| u\|^2-2u\cdot v\\
=6(1^2)-2(2)=6-4=2.$$
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 13 - Vector Geometry - 13.3 Dot Product and the Angle Between Two Vectors - Exercises - Page 666: 41
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.
