Show that the function no-f 0, z = 0 f(2) = { – y* z#0 x2 + y? x² + y² is not differentiable at z = 0

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Show that the function
z = 0
0,
f(2) =
x* + y°
x² + y²
z #0
x2 + y²
is not differentiable at z = 0
Transcribed Image Text:Show that the function z = 0 0, f(2) = x* + y° x² + y² z #0 x2 + y² is not differentiable at z = 0
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