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If int (dx)/(x^(2)+a^(2))=k cot^(-1) ""(...

If `int (dx)/(x^(2)+a^(2))=k cot^(-1) ""(x)/(a)+c` then the value of k is-

A

a

B

`-a`

C

`(1)/(a)`

D

`-(1)/(a)`

Text Solution

Verified by Experts

The correct Answer is:
D
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