find the limit if it exists. lim (x ,y)→(0 ,0) x^2+xy^2 /x^4+y^4

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.5: Rational Functions
Problem 7E
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find the limit if it exists. lim (x ,y)→(0 ,0) x^2+xy^2 /x^4+y^4
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