Assume that f(r, y) is a function given by if (r, y) # (0,0), f(r, y) = 0 if (r, y) = (0, 0).

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter2: Functions And Graphs
Section2.6: Proportion And Variation
Problem 18E
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Prove whether f(x, y) is differentiable at x = 0 and y = 0

(a) Assume that f(r, y) is a function given by
ry
if (r, y) # (0,0),
f(r, y) =
if (x, y) = (0,0).
Transcribed Image Text:(a) Assume that f(r, y) is a function given by ry if (r, y) # (0,0), f(r, y) = if (x, y) = (0,0).
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