# Doubt from integrals

ignore post

a option

C option....

Even I had come till the second step. No, I don't have solution for this.

a option for sure correct please see its e^(-x)

instead of e^x at ln(..) in this term..

answer key pointing wrong answer..

I got 'c'. Posting in a minute.

ooo sheesh i got my mistake @Samarth_2020

its should be 2ln3 instead of ln3 now c option is correct i apologise for my mistake..

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Your method is far better btw.

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I don’t think ,integration of 1/( e^x + 1 ) can be written as ln (e^x + 1)

For integrating this you need to split numerator into e^x +1 -e^x

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sir multiplied nd divide by e^(-x) then taken t to it.. @Shwetanshu_2018 bro will turn sane result..

sir i apologised for it in #post7