Answer :

We know that:

^{n}C_{r} =

⇒^{71}C_{71}=

⇒^{71}C_{71}=

⇒^{71}C_{71}= …

⇒^{71}C_{71}=1

Ans: ^{71}C_{71}=1

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Prove that the product of 2n consecutive negative integers is divisible by (2n)!

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