Answer
$$\langle -2,-2,-1\rangle $$
Work Step by Step
Recall that: $w\times v=-v\times w$
If $ w\times u=\langle 2,2,1\rangle $, then we have
$$ u\times w=-\langle 2,2,1\rangle=\langle -2,-2,-1\rangle $$
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 - Preliminary Questions - Page 676: 3
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