If f(x + y, x - y) = xy, then arithmetic mean of f(x, y) and f(y, x) is:

If f(x + y, x - y) = xy, then arithmetic mean of f(x, y) and f(y, x) i

1.	If f(x + y, x - y) = xy, then arithmetic mean of f(x, y) and f(y, x) is:
A.	x
B.	y
C.	0
D.	xy
Answer» D. xy

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