Yahoo Answers: Answers and Comments for Prove that (2n)! / n! is equivalent to...? [Mathematics]
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From Rimuel
enSG
Tue, 20 Sep 2011 15:58:42 +0000
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Yahoo Answers: Answers and Comments for Prove that (2n)! / n! is equivalent to...? [Mathematics]
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https://sg.answers.yahoo.com/question/index?qid=20110920155842AAxoZVV
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From z: (2n)!
= 1x2x3x4x...x(2n1)x(2n)
= [1x3x5x....
https://sg.answers.yahoo.com/question/index?qid=20110920155842AAxoZVV
https://sg.answers.yahoo.com/question/index?qid=20110920155842AAxoZVV
Tue, 20 Sep 2011 16:06:53 +0000
(2n)!
= 1x2x3x4x...x(2n1)x(2n)
= [1x3x5x...x(2n1)] x [2x4x6x8x...x(2n]
= [1x3x5x...x(2n1)] x [1x2x3x4x...x(n) * 2x2x2x...x2]
= [1x3x5x...x(2n1)] x n! x 2^n