Answer
See the explanation below.
Work Step by Step
The differentials of the function $z=f(x,y)$ are differentiable and continuous at the point $(a,b)$ and defined as:
$dz=f_x(x,y)dx+f_y(x,y)dy$
Calculus: Early Transcendentals 8th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1285741552
ISBN 13:
978-1-28574-155-0
Chapter 14 - Review - Concept Check - Page 981: 10
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