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int (dx)/(x^(2)+a^(2))=...

`int (dx)/(x^(2)+a^(2))=`

A

`(1)/(a)tan^(-1)""(x)/(a)+k`

B

`(1)/(a)tan^(-1)(x+a)+k`

C

`sin^(-1)""(x)/(a)+k`

D

`cos^(-1)""(x)/(a)+k`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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