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e R?, whe W -) at the poi hen the valu

e R?, whe W -) at the poi hen the valu

Advanced Engineering Mathematics
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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Let f (x, y) = k xy – x'y – xy³ for (x, y) e R?, where 'k' is a real constant. If directional derivative of f(x, y) at the point (1, 2) in the -i j 15 then the value of k is is direction of unit vector |
Transcribed Image Text:Let f (x, y) = k xy – x'y – xy³ for (x, y) e R?, where 'k' is a real constant. If directional derivative of f(x, y) at the point (1, 2) in the -i j 15 then the value of k is is direction of unit vector |
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