1.

If (1+x)^n = C_0 + C_1x+ C_2 x^2 + ….....+ C_n x^n,then C_0+2. C_1 +3. C_2 +….+(n+1) . C_n=

Answer»

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

ANSWER :A


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