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The sum of the series (1+2) +(1+2+2^(2))...

The sum of the series `(1+2) +(1+2+2^(2))+ (1+2+2^(2)+2^(3)) +….` upto n terms is

A

`2^(n+2)-n-4`

B

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

C

`2^(n+1)-n`

D

`2^(n+1)-1`

Text Solution

Verified by Experts

The correct Answer is:
A
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