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Let n be a positive integer with f(n) = ...

Let `n` be a positive integer with `f(n) = 1! + 2! + 3!+.........+n! and p(x),Q(x)` be polynomial in `x` such that `f(n+2)=P(n)f(n+1)+Q(n)f(n)` for all `n >= ,` Then

A

`P(x)=-x-2`

B

`Q(x)=-x-2`

C

`P(x)=-x-2`

D

`Q(x)=x+3`

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A, B
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