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The number of positive solution satisfying the equation `tan^(-1)((1)/(2x+1))+tan^(-1)((1)/(4x+1))=tan^(-1)(2/(x^2))` isA. 1B. 2C. 8D. 9 |
Answer» We have `tan^(-1)(1)/(2x+1)+tan^(-1)(1)/(4x+1)=tan^(-1)(2)/(x^(2))` `rarr tan^(-1)(3x+1)/(4x^(2)+3x)=tan^(-1)(2)/(x^(2))` `rarr (3x+1)/(4x^(2)+3x)=(2)/(x^(2))rarr3x^(2)-7x-6-0rarrx-2/3,3` |
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