数学-1-1-3“集合的基本运算[全集与补集]”演示课件[新人教A版必须修读1].ppt

1.1.3《集合的基本运算（全集与补集）》 教学目标 知识与能力 ：通过复习及对交集与并集性质的剖析，使学生对概念有更深刻的理解。 教学重点 ：利用补集的定义进行运算。 教学难点 ：正确地理解集合的内涵从而找准其元素；数形结合的正确使用；补集的运算。 教学方法 ：双案教学，新授课 * * 新课标人教版课件系列 《高中数学》 必修1 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 观察集合A,B,C与D的关系: A={菱形} B={矩形} C={平行四边形} D={四边形} Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 定 义 在研究集合与集合的关系时, 如果一些集合是某个给定集合 的子集,则称这个集合为全集. 全集常用U表示. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A={菱形} B={矩形} C={平行四边形} D={四边形} Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 定 义 设U是全集,A是U的一个子集, 则由U中所有不属于A的元素组 成的集合叫作U中子集A的补集 记作 或(余集). 即 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. U A Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 性质 (1) (2) U Φ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例题讲解 1. 设全集为R, 求 ⑴ ⑵ ⑶ ⑷ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. ⑺ ⑸ ⑹ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 小 结 = = Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2. 设全集为U= 求实数a的值. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 教材P12练习T1~4 作业练习 E