In what directions is the derivative of f(x,y)= xy + y² at P(6,7) equal to zero? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. (Simplify your answer, Use a comma to separate answers as needed. Type your answer in terms of i and j.) B. There is no solution.
In what directions is the derivative of f(x,y)= xy + y² at P(6,7) equal to zero? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. (Simplify your answer, Use a comma to separate answers as needed. Type your answer in terms of i and j.) B. There is no solution.
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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![In what directions is the derivative of f(x,y)= xy + y at P(6,7) equal to zero?
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. u=
(Simplify your answer, Use a comma to separate answers as needed. Type your answer in terms of i and j.)
B. There is no solution.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffdcd4c37-cad2-401f-9055-f20b7314fb27%2F89349133-99d6-4644-a20c-92734af9e0ef%2F84wuqib_processed.jpeg&w=3840&q=75)
Transcribed Image Text:In what directions is the derivative of f(x,y)= xy + y at P(6,7) equal to zero?
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. u=
(Simplify your answer, Use a comma to separate answers as needed. Type your answer in terms of i and j.)
B. There is no solution.
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