“非p”探析

摘要

新课程人教版选修2-1第一章为＂常用逻辑用语＂,意在是让学生弄清命题之间的逻辑关系,从而增强判断是非能力和推理能力,提高数学思维能力,对培养学生的逻辑思维能力起到了一定的作用。但由于这部分内容比较抽象,对学生来说在理解上存在一定难度,并且资料书上对这方面介绍得也不是很详细,笔者根据教学实践,谈谈如何来构造比较合理的命题的否定,即＂非P＂。%The new curriculum uses the chapter "common logical expressions" to help students make clear the logical relationship among propositions,so as to enhance their ability of judging an issue and improve their mathematical thinking ability.However,some of them are abstract,it is sometimes hard for students to understand,and learning materials are not detailed in introducing them.In accordance with teaching practice,the writer discusses how to create proper propositional negations,that is "non-P".