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(b) Use the gradient to find the directional derivative Du f(x, y) of f(x, y) = 9xy² + 4x² at P = (1, 2) in the direction from P = (1, 2) to Q = (2,4). (Express numbers in exact form. Use symbolic notation and fractions where needed.) Du f(1,2)= Incorrect

(b) Use the gradient to find the directional derivative Du f(x, y) of f(x, y) = 9xy² + 4x² at P = (1, 2) in the direction from P = (1, 2) to Q = (2,4). (Express numbers in exact form. Use symbolic notation and fractions where needed.) Du f(1,2)= Incorrect

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter4: Calculating The Derivative
Section4.2: Derivatives Of Products And Quotients
Problem 2E
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(b) Use the gradient to find the directional derivative Du f(x, y) of f(x, y) = 9xy² + 4x² at P = (1, 2) in the direction from P = (1, 2) to Q = (2,4). (Express numbers in exact form. Use symbolic notation and fractions where needed.) Du f(1, 2) = Incorrect
Transcribed Image Text:(b) Use the gradient to find the directional derivative Du f(x, y) of f(x, y) = 9xy² + 4x² at P = (1, 2) in the direction from P = (1, 2) to Q = (2,4). (Express numbers in exact form. Use symbolic notation and fractions where needed.) Du f(1, 2) = Incorrect
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