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Let f(n)=|n n+1 n+2 ^n Pn^(n+1)P(n+1)^n ...

Let `f(n)=|n n+1 n+2 ^n P_n^(n+1)P_(n+1)^n P_n^n C_n^(n+1)C_(n+1)^(n+2)C_(n+2)|` , where the symbols have their usual meanings. Then `f(n)` is divisible by a. `n^2+n+1` b. `(n+1)!` c. `n !` d. none of these

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