1.

`tan^(- 1)(x+2/x)-tan^(- 1)(4/x)=tan^(- 1)(x-2/x)`A. `sqrt(3)`B. `-sqrt(3)`C. `-sqrt(2)`D. `sqrt(2)`

Answer» Correct Answer - C::D
Given equation can be written as `(4x)/(x^(4)+x^(2)-4)-4/x=0`
`implies x=+-sqrt(2)`


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