江苏省泰州市高中数学第1章集合1.3交集、并集导学案(无答案)苏教版必修1.doc

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1、11.3 交集、并集一、 【学习目标】1.理解并集、交集的概念.2.会用符号、Venn 图和数轴表示并集、交集3.会求简单集合的并集和交集.4.会用区间表示某段连续实数构成的集合二、 【自学要点】1. 并集的定义?记法?读法?图示法?2. 并集的性质3. 交集的定义?记法?读法?图示法?4. 交集的性质5. 集合的区间表示三、 【尝试完成】判断下列各题的正误:1若 x A B,则 x A B. ( )2 A B 是一个集合 ( )3如果把 A, B 用 Venn 图表示为两个圆,则两圆必须相交,交集才存在 ( )4若 A, B 中分别有 2 个元素,则 A B 中必有 4 个元素 ( )四、

2、合作探究】1 (1)已知集合 A3,4,5, B1,3,6,则集合 A B_.(2)A x|10, B( x, y)|y0,求 A B,并说明其几何意义3 (1)若集合 A x|55,若 A B B,求 a 的取值范围五、 【当堂巩固】1 (1) A2,0,2, B x|x2 x20,求 A B;(2)A x|13,求 A B.22 集合 A( x, y)|x2, B( x, y)|y2,求 A B,并说明其几何意义3(1)集合 A(1,2), B(,1(3,),求 A B;(2)集合 A x|2k4, B x|2a x a3,若 A B B,求实数 a 的取值范围六、 【课堂小结】:七、 【教学反思】:

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