2020届高考数学一轮复习第1章集合与常用逻辑用语1集合及其运算课时训练文(含解析).doc

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1、1【课时训练】集合及其运算一、选择题1(2019 江西上饶调研)若集合 A1,0,1, B y|y x2, x A,则 A B( )A0 B1C0,1 D0,1【答案】C【解析】因为 B y|y x2, x A0,1,所以 A B0,12(2018 安徽合肥二模)已知全集为整数集 Z.若集合 A x|y , xZ,1 xB x|x22 x0, xZ,则 A( ZB)( )A2 B1 C2,0 D2,1,0【答案】D【解析】由题意可知,集合 A x|x1, xZ, B x|x0 或 x1 或 x0若AB,则实数 a 的取值范围是 ( )A(,1) B(,1C(,2) D(,2【答案】B【解析】集

2、合 A x|ylg( x2 x2) x|10 x|xa,因为 AB,所以 a1.10(2018 辽宁鞍山一中一模)已知集合 A x|x1, B x|x2 x60,则( )A A B x|x1 B A BRC A B x|x2 D A B x|2 x1【答案】D【解析】集合 A x|x1, B xx|x2 x60 x|2 x3,则A B x|2 x1, A B x|x3故选 D.311(2018 河南开封一模)设 UR,已知集合 A x|x1, B x|x a,且( UA) BR,则实数 a 的取值范围是( )A(,1) B(,1C(1,) D1,)【答案】A【解析】 UR,集合 A x|x11

3、,), UA(,1),由 B x|x a( a,)以及( UA) BR 可知实数 a 的取值范围是( ,1)故选 A.12(2018 贵州贵阳二模) A, B 为两个非空集合,定义集合 A B x|x A 且 xB,若 A2,1,0,1,2, B x|(x1)( x2)0,则 A B( )A2 B1,2C2,1,2 D2,1,0【答案】C【解析】 A, B 为两个非空集合,定义集合 A B x|x A 且 xB,A2,1,0,1,2, B x|(x1)( x2)0 x|2 x1, A B2,1,2故选 C.二、填空题13(2018 湖北省级示范高中联考)对于任意两集合 A, B,定义 A B x|x A 且 xB,A*B( A B)( B A),记 A y|y0, B x|3 x3,则 A*B_.【答案】3,0)(3,)【解析】由题意知 A B x|x3, B A x|3 x2, A( RB)3,0)16(2018 湖南常德一中月考)已知集合 A y|y2( a2 a1) y a(a21)0,BError!Error!.若 A B,则实数 a 的取值范围是_【答案】(, ,23 3【解析】由题意可得 A y|ya21, B y|2 y4当 A B时,Error! a2 或 a , a 的取值范围是(, ,23 3 3 34

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