Given f(x, y, z)= x ln(yz), (a) (b) rapidly; compute Dƒ(1,2,1), where ₪ = 7 - 7; find the derivative of f(x, y, z) at the point (1,2,1) in the direction the function increases most and find an equation of the plane tangent to the surface f(x, y, z) = 0, at the point (1, 2, 3).

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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Given f(x, y, z) = x ln(yz),
(a)
(b)
(c)
rapidly;
compute Duf(1, 2, j), where u =
find the derivative of f(x, y, z) at the point (1,2,1) in the direction the function increases most
and find an equation of the plane tangent to the surface f(x, y, z) = 0, at the point (1, 2, ½).
17
Transcribed Image Text:Given f(x, y, z) = x ln(yz), (a) (b) (c) rapidly; compute Duf(1, 2, j), where u = find the derivative of f(x, y, z) at the point (1,2,1) in the direction the function increases most and find an equation of the plane tangent to the surface f(x, y, z) = 0, at the point (1, 2, ½). 17
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