Prove that n．n-1 C r=(r+1)．n C r+1
．=乘號
include the solution please :)
F4 binomial expandsion問題一條
2009-09-22 3:56 am
回答 (1)
2009-09-22 5:09 am
收錄日期: 2021-04-13 16:51:44
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https://hk.answers.yahoo.com/question/index?qid=20090921000051KK01464