Answer
$\lt3sec^{2}(3x-4y),-4sec^{2}(3x-4y) \gt$
Work Step by Step
$f_x(x,y)=3sec^{2}(3x-4y)$
$f_y(x,y)=-4sec^{2}(3x-4y)$
Gradient vector field of $f$ is: $\lt3sec^{2}(3x-4y),-4sec^{2}(3x-4y) \gt$
Multivariable Calculus, 7th Edition
by Stewart, James
Published by
Brooks Cole
ISBN 10:
0-53849-787-4
ISBN 13:
978-0-53849-787-9
Chapter 16 - Vector Calculus - 16.1 Exercises - Page 1086: 22
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