Q 3241101023.     If ` y = sec^(-1) ( (x +1)/(x -1)) + sin^(-1) ( (x - 1)/(x +1))` , then `(dy)/(dx)` is equal to


NDA 2017 Paper 1 Sept
A

`0`

B

`1`

C

` (x - 1)/(x +1)`

D

` (x + 1)/(x -1)`

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