Thr ciefficient of x^(n-2) in the polyno...

Thr ciefficient of `x^(n-2)` in the polynomial `(x-1)(x-2)(x-3)"…."(x-n)`, is

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

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

`(n(n+1)(2n+2))/(6)`

none of these

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