作者mqazz1 (無法顯示)
看板Math
標題[離散] 排容 字母的排列
時間Sat Aug 6 20:13:23 2011
In how many ways can one arrange all of the letters in the word INFORMATION
so that no pair of consecutive letters occurs more than once?
請問這題要怎麼解?
謝謝
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