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The co-efficient of x^k (0 <= k <= n) in...

The co-efficient of `x^k (0 <= k <= n)` in the expansion of `E= 1+(1+x) +(1+x)^2+.....+(1+x)^n` is

A

`""^(n)C_(k)`

B

`""^(n+1)C_(k)`

C

`""^(n+1)C_(k+1)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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