Answer
$$ (3u+4w)\times w
= \langle 0,9,3\rangle.$$
Work Step by Step
$$ (3u+4w)\times w=3u\times w+4w\times w= 3\langle 0,3,1\rangle+0\\
= \langle 0,9,3\rangle.$$
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 - 13.4 The Cross Product - Exercises - Page 677: 20
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