排列、组合中的一题多解和一题多变
MATHS PHYSICS & CHEMISTRY FOR MIDDLE SCHOOL STUDENTS(SENIOR HIGH SCHOOL EDITION)（2007）
Abstract
正确熟练地运用两个原理来分析和解决排列组合的应用题,历来是同学们学习时的难点.之所以难,主要是排列组合应用题的内容比较抽象,题型繁多,灵活多变,解题方法独特,与同学们原有的解题经验不相同.
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