Find the directional derivative of f(x,y) = x?y3 + 2x4y at (1, -2) in the direction of v = <3, - 4> Select one: О а. 8 O b. -8 О с -30.4 d -152
Find the directional derivative of f(x,y) = x?y3 + 2x4y at (1, -2) in the direction of v = <3, - 4> Select one: О а. 8 O b. -8 О с -30.4 d -152
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Find the directional derivative of f(x,y)
= x?y3 + 2x4y at (1, -2) in the direction
of v = <3, - 4>
Select one:
а. 8
b. -8
-30.4
O d. -152
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