JEE Advanced 2020 Full Test 4 Paper 2

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Question : 53 of 54
 
Marks: +1, -0
If f(x)+f(y)=f(‌
x+y
1−xy
)
for all x,y∈R,xy≠1 and
lim
x→0
‌
f(x)
x
=2
,
then the value of ‌
f(√3)
f′(−2)
is
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