UPSC NDA I 2017 Mathematics Solved Paper

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Question : 61 of 120

Marks: +1, -0

What is ∫‌‌

xe−1+ex−1

xe+ex

equal to ?

[NDA I 2017]

‌‌
x2
2
+c
ln(x+e)+c
ln(xe+ex)+c
‌‌
1
e
‌ln(xe+ex)+c

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