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Let f(x)=a+2b cos^(-1)x, b gt0. If doma...

Let `f(x)=a+2b cos^(-1)x, b gt0`. If domain and range of f(x) are the same set, then `(b-a)` is equal to :

A

`1-(1)/(pi)`

B

`(2)/(pi)`

C

`(2)/(pi)+1`

D

`1+(1)/(pi)`

Text Solution

Verified by Experts

The correct Answer is:
D
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