int(1)/(x^(2)sqrt(1+x^(2)))dx...

`int(1)/(x^(2)sqrt(1+x^(2)))dx`

A

`-(sqrt(1+x^2))/(x)+c`

B

`(sqrt(1+x^2))/(x) +c`

C

`-(sqrt(1-x^2))/(x)+c`

D

`-(sqrt(x^2 -1))/(x) +c`

Verified by Experts

The correct Answer is:

A

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