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If f(x)=int1^x(lnt)/(1+t)dt where x>0, t...

If `f(x)=int_1^x(lnt)/(1+t)dt` where x>0, then the values of of x satisfying the equation `f(x)+f(1/x)=2` is

A

`2`

B

`e`

C

`e^(-2)`

D

`e^(2)`

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