1.

Let f(n)=∣∣∣∣∣nn+1n+2nPnn+1Pn+1n+1Pn+2nCnn+1Cn+1n+1Cn+2∣∣∣∣∣Then, f(n) is divisible by

Answer»

Let f(n)=∣∣
∣
∣
∣
nn+1n+2nPnn+1Pn+1n+1Pn+2nCnn+1Cn+1n+1Cn+2∣∣
∣
∣
∣


Then, f(n) is divisible by





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