answer to problem: 2n!(2n-1)!/(2n)!(n-1)!

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1 Answer

n!=n(n-1)!; (2n)!=(2n)(2n-1)!

Therefore

2(n(n-1)!)((2n-1)!)/((2n)(2n-1)!)=2n/(2n)=1.

by Top Rated User (1.2m points)

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