f(x) = (1)/(1-2 cos x) का परिसर:...

`f(x) = (1)/(1-2 cos x)` का परिसर:

A

`[(1)/(3), 1]`

B

`[-1, (1)/(3)]`

C

`(-oo, -1] cup [(1)/(3), oo)`

D

`[-(1)/(3), 1]` है।

Verified by Experts

The correct Answer is:

B

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