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The possible values of x, which satisfy ...

The possible values of x, which satisfy the trigonometric equation `tan^(-1)((x-1)/(x-2))+tan^(-1)((x+1)/(x+2))=(pi)/(4)` are

A

`pm(1)/(sqrt(2))`

B

`pmsqrt(2)`

C

`pm(1)/(2)`

D

`pm2`

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