Homework Statement
(x,y)-->(0,0) y*ln (y2+x2)
Homework Equations
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The Attempt at a Solution
i've tried polar coordinates i end up with sinθ in it don't know how to proceed
and I've taken several paths like y=0 , x=0 , x=y2 , x=y , x=y3
they all yeild zero
Edit : is it...