a²f x²-y² дудх x2+y2

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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If f (x ; y) = x2 arctan (y / x) - y2 arctan (x / y) 

check (image 1)

if (image 2) 

a²f
x²-y2
дудх
х2+у2
+y2
Transcribed Image Text:a²f x²-y2 дудх х2+у2 +y2
(x; у) + (0; 0)
Transcribed Image Text:(x; у) + (0; 0)
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