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Period of cos (x+ (x)/(3) + (x)/(3^2) + ...

Period of `cos (x+ (x)/(3) + (x)/(3^2) + …..)` is

A

`pi/3`

B

`2pi/3`

C

`pi`

D

`4pi/3`

Text Solution

Verified by Experts

The correct Answer is:
D
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