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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