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Let R=(2+sqrt(3))^(2n) and f=R-[R] whe...

Let `R=(2+sqrt(3))^(2n)` and `f=R-[R]` where `[ ]` denotes the greatest integer function, then `R(1-f)` is equal to

A

1

B

`2^(2n)`

C

`2^(2n-1)`

D

`""^(2n)C_(n)`

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