If int(1)/((x^(2)+4)(x^(2)+9))dx=A" tan"...

If `int(1)/((x^(2)+4)(x^(2)+9))dx=A" tan"^(-1)(x)/(2)+Btan^(-1)((x)/(3))+C`, then A-B=

A

`1/6`

B

`1/30`

C

`-1/30`

D

`-1/6`

Verified by Experts

The correct Answer is:

A

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