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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
我在寫功課有些關於排列的問題，請附上完整的算法~ 謝謝: )
Jun 9th 2013, 07:03

我在寫功課有些關於排列的問題，請附上完整的算法~ 謝謝: )

1.設有甲、乙、丙、丁、戊五人排成一列，若規定甲、乙不排首且丙、丁不排尾之排法有幾種?
A:48
2.甲、乙、丙、丁、戊、己等六人圍成一圓桌而坐，若甲、乙相鄰，而丙、丁兩人不相鄰，則有幾種排法?
A:24
3.以四種不同顏色塗四邊形ABCD(任意四邊形)之四邊，相鄰兩邊不同色有幾種塗法?
A:84

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