Question: Show that the function f ( x , y ) = { ( ( x ^ ( 2 ) - y ^ ( 2 )

Show that the function
f(x,y)={((x^(2)-y^(2))/(x^(2)+y^(2)),(x,y)!=(0,0)),(0,0):}
is not continuous at (0,0)
Show that the function f ( x , y ) = { ( ( x ^ (

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