Answer
$D_{u}f(0,0)=\frac{2}{\sqrt{5}}$
Work Step by Step
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Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 13 - Functions of Several Variables - 13.6 Exercises - Page 924: 11
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