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The root of the equation tan^(-1)((x-1)/...

The root of the equation `tan^(-1)((x-1)/(x+1))+tan^(-1)((2x-1)/(2x+1))=tan^(-1)((23)/(36))` is

A

`-(3)/(8)`

B

`-(1)/(2)`

C

`(3)/(4)`

D

`(4)/(3)`

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The correct Answer is:
D
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