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Questions  

g(x) is symmetrical about  Let g(x)=f(x)1. If f(x)+f(1x)=2   xR, then 

a
the origin
b
the line x=12
c
the point (1,0)
d
the point 12,0

detailed solution

Correct option is D

f(x)−1+f(1−x)−1=0 So, g(x)+g(1−x)=0.  Replacing x by x+12, we get g12+x+g12−x=0 So, it is symmetrical about 12,0.

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