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)`

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The correct Answer is:

A

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