The n^(th) term of the sequence 1/2,3/4,...

The `n^(th)` term of the sequence `1/2,3/4,7/8,15/16,...` is

A

`2^(n) -n-1`

B

`1-2^(-n)`

C

`2^(-n) + n -1`

D

`2^(n-1)`

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The correct Answer is:

B

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