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In damped oscillations, the amplitude of...

In damped oscillations, the amplitude of oscillation is reduced to one-third of its initial value of `9cm` at the end of `100` oscillations. What will be its amplitude of oscillation in `cm` when it completes `200` oscillations.

A

`a_(0)//2`

B

`a_(0)//4`

C

`a_(0)//6`

D

`a_(0)//9`

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