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If-m-C-1-n-C-2-express-m-in-terms-of-n-

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Question Number 114943 by ZiYangLee last updated on 22/Sep/20
If ^m C_1 =^n C_2 , express m in terms of n.
IfmC1=nC2,expressmintermsofn.
Answered by Dwaipayan Shikari last updated on 22/Sep/20
((m!)/(1!(m−1)!))=((n!)/(2!(n−2)!)) m=((n(n−1))/2)
m!1!(m−1)!=n!2!(n−2)!m=n(n−1)2
Commented by ZiYangLee last updated on 26/Sep/20
Tks
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