2018_2019学年高中数学第一章集合1.2.2集合的运算练习新人教B版必修1.doc

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11.2.2 集合的运算【选题明细表】知识点、方法 题号交集、并集运算 1,2,8补集运算 3,7交并补综合运算 4,6,11利用集合运算求参数取值 5,7,10,12,13Venn 图的应用 91.(2018辽宁葫芦岛六校协作体月考)已知集合 M=0,4,N=x|0-1 (C)a-1 (D)a (B)a ,故选 A.11.已知全集 U=x|x4,集合 A=x|-2a.(1)若 AB= ,求 a 的取值范围;(2)若 AB=R,求 a 的取值范围;(3)若 1AB,求 a 的取值范围.解:(1)画出如图(1)所示的数轴,知只有 a2 时,有 AB= .(2)要使 AB=R,如图(2),即 a 所对应的点应在 2 所对应的点的左侧,故 a2.(3)因为 1AB,1A,所以 1B.故 a1,如图(3).

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