UPSC NDA II 2015 Mathematics Solved Paper

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Question : 88 of 120

Marks: +1, -0

∫

dx

1+e−x

is equal to
Where c is the constant of integration

[NDA II 2015]

1+ex+c
ln(1+e−x)+c
ln(1+ex)+c
2ln(1+e−x)+c

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