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(1)/((1+x^(2))tan^(-1)x) का समाकलन कीज...

`(1)/((1+x^(2))tan^(-1)x)` का समाकलन कीजिये -

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[ If xgt0 then which of the following is true 1) tan^(-1)xgt(x)/(1+x^(2)), 2) tan^(-1)x=(x)/(1+x^(2)) 3) tan^(-1)xlt(x)/(1+x^(2)), 4) tan^(-1)x!=(x)/(1+x^(2))]