(数学)1-1-3“集合的基本运算”演示课件1[北师大版必须修读1]-.ppt

ks5u精品课件 例题分析 例题分析 * 1.1.3 集合的基本运算 实数有加减乘除的基本运算，集合是否有类似的运算法则 ？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 思考 考察下列各个集合,你能说出集合C与集合A,B之间的关系吗? (1) A={1,3,5}, B={2,4,6} ,C={1,2,3,4,5,6} (2) A={x|x是有理数},B={x|x是无理数}, C={x|x是实数}. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1.并集 一般地,由所有属于集合A或属于集合B的元素所组成的集合,称为集合A与B的并集,记作A∪B,(读作“A并B”).即 A∪B={x|x∈A,或x∈B} Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1。 设A={4,5,6,8}, B={3,5,7,8},求A∪B. 2。 设集合A={x|x为等腰三角形},集合B={x|x为直角三角形} 求A∪B. 练习 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 考察下列各个集合,你能说出集合A,B与集合C之间的关系吗? A={2,4,6,8,10}, B={3,5,8,12} ,C={8}; (2) A={x|x是新华中学2004年9月在校的女同学}, B={x|x是新华中学2004年9月入学的高一级同学}, C={x|x是新华中学2004年9月入学的高一级女同学}. 思考 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 一般地,由属于集合A且属于集合B的所有元素组成的集合,称为A与B的交集,记作A∩B,(读作“A交B”),即 A∩B={x|x∈A,且x∈B}. 2.交集 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1。 新华中学开运动会,设 A={x|x是新华中学高一年级参加百米赛跑的同学} B={x|x是新华中学高一年级参加跳高比赛的同学}, 求A∩B. 练习 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3. 交集的性质 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4.并集的性质 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例题分析 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.设 ， 若 ，求实数m的取值范围。 例题分析 Evaluation