Q4 Consider the function f(r, y, z) = ry + y² + 2?. (a) What is the gradient grad f of f, and what is its value at the point (2, 1, 1)? (b) What is the rate of change of f at the point (2, 1, 1) in the direction of the unit vector în = i+ j? (c) What is the maximum rate of change of f at the point (2,1, 1), and in what direction does this maximum value occur? Transcribed Image Text: Consider the function f(r, y, z) = ry +y? + 22. (a) What is the gradient grad fof f, and what is its value at the point (2, 1, 1)? (b) What is the rate of change of f at the point (2, 1,1) in the direction of the unit vector în =i+j? (c) What is the maximum rate of change of f at the point (2,1,1), and in what direction does this maximum value occur?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Q4
Consider the function f(r, y, z) = 1ry + y + 2?.
(a) What is the gradient grad f of f, and what is its value at the point
(2, 1, 1)?
(b) What is the rate of change of f at the point (2, 1, 1) in the direction of
the unit vector în = i+ j?
(c) What is the maximum rate of change of f at the point (2,1, 1), and in
what direction does this maximum value occur?
Transcribed Image Text: Consider the function f(r, y, 2) = ry +y? + 22. (a) What is the gradient grad fof f, and what is its value at the point (2, 1, 1)? (b) What is the rate of
change of f at the point (2, 1,1) in the direction of the unit vector în =i+j? (c) What is the maximum rate of change off at the point (2,1,1), and in what direction does this
maximum value occur?
Transcribed Image Text:Q4 Consider the function f(r, y, z) = 1ry + y + 2?. (a) What is the gradient grad f of f, and what is its value at the point (2, 1, 1)? (b) What is the rate of change of f at the point (2, 1, 1) in the direction of the unit vector în = i+ j? (c) What is the maximum rate of change of f at the point (2,1, 1), and in what direction does this maximum value occur? Transcribed Image Text: Consider the function f(r, y, 2) = ry +y? + 22. (a) What is the gradient grad fof f, and what is its value at the point (2, 1, 1)? (b) What is the rate of change of f at the point (2, 1,1) in the direction of the unit vector în =i+j? (c) What is the maximum rate of change off at the point (2,1,1), and in what direction does this maximum value occur?
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