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

If `f(x)=int_1^x(lnt)/(1+t)dt`, then

A

`f((1)/(x))=-int_(1)^(x)(lnt)/(t(1+t))dt`

B

`f((1)/(x))=int_(1)^(x)(lnt)/(t(1+t))dt`

C

`f(x)+f((1)/(x))=0`

D

`f(x)+f((1)/(x))=(1)/(2)(lnx)^(2)`

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