UPSC NDA I 2015 Mathematics Solved Paper

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Question : 66 of 120

Marks: +1, -0

If f(x)=loge(

1+x

1−x

),g(x)=

3x+x2

1+3x2

and g∘f(t)=g(f(t)), then what is g∘f(

e−1

e+1

) equal to ?

[NDA I 2015]

2
1
0
1/2

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