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The sum to n terms of the series 1/2+3/4...

The sum to n terms of the series` 1/2+3/4+7/8+15/16+..... is given by`

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Sum of the first n terms of the series 1/2+3/4+7/8+(15)/(16)+......... is equals to (a). 2^n+n-1 (b). n-1+2^(-n) (c). n+2^(-n)-1 (d). 2^n+1

Sum of the first n terms of the series 1/2+3/4+7/8+(15)/(16)+......... is equals to (a). 2^n-n-1 (b). 1-2^(-n) (c). n+2^(-n)-1 (d). 2^n+1

Sum of the first n terms of the series 1/2+3/4+7/8+(15)/(16)+......... is equals to (a). 2^n-n-1 (b). 1-2^(-n) (c). n+2^(-n)-1 (d). 2^n+1