Question: b . lim ( x , y ) ( 0 , 0 ) x 2 y 2 x 2 - y 2 ( hint: use

b.lim(x,y)(0,0)x2y2x2-y2(hint: use polar coordinates)
b . lim ( x , y ) ( 0 , 0 ) x 2 y 2 x 2 - y 2 (

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