Answer
$3\sqrt 5$
Work Step by Step
|a|=$\sqrt (1)^2+(-6)^2+(2\sqrt 2)^2$=$\sqrt 45$, |a|=$3\sqrt 5$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 9 - Section 9.4 - Vectors in Three Dimensions - 9.4 Exercises - Page 658: 14
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