5. Given the function x+y+2, if x = 1 or y = 1 2, if x 1 and y # 1. Show that fe(1, 1) and fy(1, 1) exist and but f is not differentiable at (1,1). f(x, y) -
5. Given the function x+y+2, if x = 1 or y = 1 2, if x 1 and y # 1. Show that fe(1, 1) and fy(1, 1) exist and but f is not differentiable at (1,1). f(x, y) -
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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Transcribed Image Text:5. Given the function
x + y + 2,
1 or y 1
-
2,
if x 1 and y # 1.
Show that fx(1, 1) and fy(1, 1) exist and but f is not differentiable at (1,1).
f(x, y)
-
if x =
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