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The coefficient of x^(k) in the expansio...

The coefficient of `x^(k)` in the expansion of `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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