任取（不分次序）k個小於等於N的正整數的取法有C(N+k-1,k)種。

來源: 皆兄弟也於 2010-06-15 12:54:43 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.