Question: Show that lim ( x , y ) ( 0 , 0 ) 2 x y x 2 + 2 y 2 does not exist.

Show that lim(x,y)(0,0)2xyx2+2y2 does not exist.
Show that lim ( x , y ) ( 0 , 0 ) 2 x y x 2 + 2 y

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