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`y=tan^(-1)""(3x-x^(3))/(2x^(2)-1),-(1)/(sqrt(3))ltxlt(1)/(sqrt(3))` |
Answer» Correct Answer - `(3)/(1+x^(2))` `y=tan^(-1)((3x-x^(3))/(1-3x^(2)))` `Put x tan theta.` Then, `y=tan^(-1)((3 tan theta - tan^(3)theta)/(1-3 tan^(2)theta))` `=tan^(-1)(tan 3theta)` `=3theta` `=3tan^(-1)x` `therefore" "(dy)/(dx)=(3)/(1+x^(2))` |
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