you are right:C(20,4)=C(16+3,3)+C(15+3,3)+...+C(1+3,3)+C(0+3,3)

皆兄弟也 · 2010-09-08 10:09:50Z

you are right:C(20,4)=C(16+3,3)+C(15+3,3)+...+C(1+3,3)+C(0+3,3)簡介

來源: 皆兄弟也於 2010-09-08 10:09:50 [檔案] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: 回複：回複：回複：請教解數學題。由 guest1000 於 2010-09-07 19:51:53

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