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JEEMAIN and NEET
>>
Mathematics
>>
Class11
>>
Relations and Functions
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Q)
If
f
(
x
)
=
c
o
s
l
o
g
x
then
f
(
x
2
)
.
f
(
y
2
)
−
1
2
(
f
(
x
2
y
2
)
+
f
(
x
2
y
2
)
)
=
?
(A) -2
(B) -1
(C) 0
(D) 1/2
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