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Sum of the first n terms of the series 1...

Sum of the first n terms of the series `1/2+3/4+7/8+15/16+ . . .` is equal to

A

`2^(n) -n-1`

B

`1-2^(-n)`

C

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

D

`2^n -1`

Text Solution

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The correct Answer is:
C
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