1.

Let S=(2n)/(1)C_(0)+(2^(2)n)/(2)C_(1)+(2^(3)n)/(3)C_(2)+.....+(2^(n+1)n)/(n+1)C_(n). . Then S equals-

Answer»

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

Answer :B


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