Find the directional derivative of f at P in the direction of a. f (x, y, z) = xy + z²; P(-5,-4, –4); a =i+j+k NOTE: Enter the exact answer. Duf =

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter2: Functions And Graphs
Section2.6: Proportion And Variation
Problem 18E
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Find the directional derivative of f at P in the direction of a.
f (x, y, z) = xy + z²; P(-5, -4, –4); a =i+j+k
NOTE: Enter the exact answer.
Duf =
Transcribed Image Text:Find the directional derivative of f at P in the direction of a. f (x, y, z) = xy + z²; P(-5, -4, –4); a =i+j+k NOTE: Enter the exact answer. Duf =
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