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Let S=2/1^nC0+2^2/2^nC1+2^3/3^nC2+....+2...

Let `S=2/1`^nC_0+2^2/2`^nC_1+2^3/3`^nC_2+....+2^(n+1)/(n+1)`^nC_n`. Then S equals

A

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

B

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

C

`(3^n-1)/n`

D

`(2^n-1)/n`

Text Solution

Verified by Experts

The correct Answer is:
B
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