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Suppose f is a function of two variables given by f(x, y) = 4xy - 2x. If u is a unit vector, what is the largest possible value that Du(1, 3) can have?

Suppose f is a function of two variables given by f(x, y) = 4xy - 2x. If u is a unit vector, what is the largest possible value that Du(1, 3) can have?

Elementary Linear Algebra (MindTap Course List)
Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter4: Vector Spaces
Section4.1: Vector In R^n
Problem 28E
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Suppose f is a function of two variables given by f(x, y) = 4xy - 2x. If u is a unit vector, what is the largest possible value that Du(1, 3) can have?
Transcribed Image Text:Suppose f is a function of two variables given by f(x, y) = 4xy - 2x. If u is a unit vector, what is the largest possible value that Du(1, 3) can have?
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