1 . 方程
的解集中有两个元素.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2642edab074ce81dccd6a4b1234510d.png)
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2 . 已知集合
,
,则
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c0d238aac41d512db9ac5c8c1f32cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbe54aff76d3c1e04138dc96082ecbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5209b4ae943b34931b328d1feb91dd3.png)
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解题方法
3 . 已知全集为R,集合
,
,并且
,则
的取值范围是
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1274769dd8c0986e30bb0d370836c357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df98e6c360f2a2edf35d2d7319b2ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fec5797aae117f0e0d6da987cf3377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a271fbe1d978a7a1d25d4b38cae7615d.png)
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4 . 绝对值小于3的整数组成的集合用列举法可表示为
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac85494272e4dddbd4523449e1bf039.png)
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5 . 所指对象“接近于2021的数”能组成集合.( )
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6 . 已知全集U,集合
,
,
,则集合
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0b37df360185ccaf375b4e7e1a24c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4456bb8b59eedcb61019b33580c04f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0658f5cbf327f33e7f4a80132da4c84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a61c0a52b93d0afaecebd39004271e.png)
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7 . 已知集合
,
,若
,则
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316a92a24c61a397758b9a07845e0190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c933858983a9a2a8ec21d11847f08fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb3c85d24c23c56b4c9c47d7cb55a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6d79383c6503e1817378347afc66ee.png)
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解题方法
8 . 已知全集
,集合
,
,则
. ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ff52d97910b1ba0dda2e67bc5f7625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48bfdfd1a175a860a18587e4c21e04da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a93031e4fafab7d1e77a04f5f45d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be417400619e7d206dfe01b93b152a02.png)
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9 . 已知集合
,
,
,则
. ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c72c83af2c26d8b6217e44ac7ac7dfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d6d8039967af15e7c5c7ff05b04ac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8718fa54ae6ca819d2b097c12870b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
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10 . “周涛的所有好朋友”能构成集合. ( )
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