Question: Show that the following limits do not exist: ( x , y ) ( 1 , 2 ) lim ? x Y - 2 x

Show that the following limits do not exist:
(x,y)(1,2)lim?xY-2x-Y+2x2+Y2-2x-4Y+5
lim(x,y)(0,0)x2Yx4+Y2
Find the partial derivatives:
Show that the following limits do not exist: (x,y)(1,2)lim?xY-2x-Y+2x2+Y2-2x-4Y+5 lim(x,y)(0,0)x2Yx4+Y2 Find

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