The derivative of f(r, y) at P(1,2) in th in the direction of-2j is -3. Then the of -i - 2j is

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.3: The Natural Exponential Function
Problem 44E
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The derivative of f(r, y) at P(1, 2) in the direction of i +j is 2/2 and
in the direction of-2j is -3. Then the derivative of f in the direction
of -i - 2j is
choose one of the
answer
7
V5
4
V5
4.
V5
7.
V5
Transcribed Image Text:The derivative of f(r, y) at P(1, 2) in the direction of i +j is 2/2 and in the direction of-2j is -3. Then the derivative of f in the direction of -i - 2j is choose one of the answer 7 V5 4 V5 4. V5 7. V5
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