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The coefficient of x^(n-2) in the polyno...

The coefficient of `x^(n-2)` in the polynomial (x-1)(x-2)(x-3)....(x-n) is

A

`(n(n^2+2)(3n+1))/24`

B

`(n(n^2-2)(3n+1))/24`

C

`(n(n^2-1)(3n+4))/24`

D

none of these

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The correct Answer is:
D
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