[請問] 請教一題數學:Realtime－線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

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批踢踢實業坊 ask 板

[請問] 請教一題數學

May 15th 2014, 10:44, by charlieing

作者charlieing (NEMO好可愛)

看板ask

標題[請問] 請教一題數學

時間Thu May 15 10:44:51 2014

請教一題數學,排列組合問題：題目如下：有ABCD四字母, 請依2~8碼順序排列,可有幾種組合,字母可重復出現？ ex:AB,BA,BB,AAB.... 可以順便幫我列個式子嗎～謝謝～ -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 118.163.80.181 ※ 文章網址: http://www.ptt.cc/bbs/ask/M.1400121894.A.31B.html

→ wxtab019:不就4^2+4^3+4^4+4^5+4^6+4^7+4^8 05/15 10:51

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