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The sum of the series (2)/(3) + (8)/(9) ...

The sum of the series `(2)/(3) + (8)/(9) + (26)/(27) + (80)/(81) + …`to n terms is

A

`n + (1)/(2) (3^(n) -1)`

B

`n-(1)/(2) (3^(n)-1)`

C

`n-(1)/(2) (3^(-n)-1)`

D

`n-(1)/(2) (1-3^(-n))`

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