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If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+ . . ....

If `(1+x)^(n)=C_(0)+C_(1)x+C_(2)x^(2)+ . . .+C_(n)x^(n)`, then the value of :
`C_(1)+2C_(2)+3C_(3)+ . . .+nC_(n) ` is:

A

`n.2^(n-1)`

B

`(n+2)2^(n)`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
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