If xy(x+y)=1, then $$ {1 over x^3 y^3}-{x^3-y^3}$$ is equal to-

1.	If xy(x+y)=1, then $$ {1 over x^3 y^3}-{x^3-y^3}$$ is equal to-
A.	0
B.	1
C.	3
D.	-2
Answer» D. -2

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