Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 15 - Differentiation in Several Variables - 15.3 Partial Derivatives - Preliminary Questions - Page 780: 4


$$ f_x= 0.$$

Work Step by Step

Note that even though the equation looks complicated, there is no $x$ in the equation. Thus, all the other variables are constants and the derivative with respect to $x$ is zero: $$ f_x=\frac{\partial f}{\partial x} =0.$$
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