If \[f(x+y,x-y)=xy\,,\] then the arithmetic mean of \[f(x,y)\] and \[f(y,x)\] is [AMU 2002, 05]

If \[f(x+y,x-y)=xy\,,\] then the arithmetic mean of \[f(x,y)\] and \[f

1.	If \[f(x+y,x-y)=xy\,,\] then the arithmetic mean of \[f(x,y)\] and \[f(y,x)\] is [AMU 2002, 05]
A.	\[x\]
B.	\[y\]
C.	0
D.	1
Answer» D. 1

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If \[f(x+y,x-y)=xy\,,\] then the arithmetic mean of \[f(x,y)\] and \[f(y,x)\] is [AMU 2002, 05]

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