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The coefficient of x^(6) in: [(1+x)^(6...

The coefficient of `x^(6)` in:
`[(1+x)^(6)+(1+x)^(7)+ . . .+(1+x)^(15)]` is:

A

`""^(16)C_(9)`

B

`""^(16)C_(5)-""^(6)C_(5)`

C

`""^(16)C_(6)-1`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
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