coth(x'y®) = Z dz
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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Please answer both questions. Thank you.

Transcribed Image Text:7x?y
Examine the behavior of f(x, y)
as (x, y) approaches (0,0).
6x4 + y?
Use "infinity" for "∞" and "-infinity" for "-o". Use "DNE" for "Does not exist".
(a) Taking a linear approach to the origin along the y-axis, we find
lim
(x,y)→(0,0), x=0
6x4 + y?
(b) Taking a linear approach to the origin along the x-axis, we find
7x²y
lim
(x,y)→(0,0), y=0
6x4 + y?
(c) Taking a linear approach to the origin along a line y = mx with m + 0 we find
lim
(г,у) —>(0,0), у—тӕ
7x?y
6x4 + y2
)-
lim
Thought question: Do your answers to parts (a)-(c) allow you to conclude that the limit exists?
(d) Taking an approach to the origin along the parabola y = x² we find
lim
(x,y)→(0,0), y=æ?
7x?y
6x4 + y2
lim
(e) Find the value of the limit. Be sure you can explain
your
answer.
lim
(x,y)→(0,0)
7x²y
6x4 + y?

Transcribed Image Text:Compute the partial derivatives:
z =
coth(x²y³)
dz
dx
dz
||
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