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int(dx)/((x^(2)+a^(2))^(2)')(agt0)...

`int(dx)/((x^(2)+a^(2))^(2)')(agt0)`

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Verified by Experts

The correct Answer is:
`(1)/(2a^(3))[tan^(-1)((x)/(a))+(1)/(2)sin2(tan^(-1)((x)/(a)))]+c`
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