配套习题-插空法解不相邻问题 -【青果学院】

排列组合

排列组合的区别与联系00:10:52

捆绑法解相邻问题00:08:19

插空法解不相邻问题00:09:59

隔板法解“至少”型问题00:06:42

优先考虑排列组合中的特殊元素00:10:18

除法解决定序问题00:10:50

直接法解排列组合问题00:05:43

本课配套习题挑战模式1/3

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单选题

难度系数：

1.5为同学站成一排，甲和乙两个同学不能相邻的排法有___________种。

提示1：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
答案：QQ==
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