1.

`(x^(2))/((x^(2)+1)(x^(2)+4)(x^(2)+9))`

Answer» Correct Answer - `-(1)/(24)tan^(-1)x+(2)/(15)tan^(-1)((x)/(2))-(3)/(40)tan^(-1)`
माना `x^(2)=t` तब
`(x^(2))/((x^(2)+1)(x^(2)+4)(x^(2)+9))=(t)/((t+1)(t+4)(t+9))`
`=-(1)/(24(t+1))+(4)/(15).(1)/((t+4))-(9)/(40(t+9))`
(आंशिक भिन्नो से )


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