定义
,设
、
、
是某集合的三个子集,且满足
,判断
与
的条件关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5871083b738b5f6d5aac19476a4295bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d83d90cad7b10a34c2c92762e7384e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89cce6e296819097e4ae63994ec706f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb8010e64b124eb2a9c3cb0d56ad1f9.png)
20-21高一·全国·课后作业 查看更多[2]
更新时间:2021-08-25 00:16:04
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解答题-问答题
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【推荐1】设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
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【推荐2】已知A,B,C,D,E是空间五个不同的点,若点E在直线BC上,求证:“AC与BD是异面直线”是“AD与BE是异面直线”的充分必要条件.
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解题方法
【推荐1】定义一种集合运算:
,且
.例如,
,
,则有
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(1)求
;
(2)求
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1944b815fed5fc15d2e1dae18103fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e10255d9c38c5db2be76d20e809acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522954ce536d559cf03638d87fad504c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f40e78deba00813c306eb88e470da0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81919684bc4047d376c7e57dc6c8f1c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eeaa30850a2dd1abcb46208ac8b6a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47e90aa60757ef5ff7846d301f3aa6.png)
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名校
【推荐1】已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/e457d346-6db9-41fb-a651-cb8c100ebd8e.png?resizew=144)
(1)求
,
;
(2)求图中阴影部分表示的集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f641f04dfe10bd80166b7b238ffeb1af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59e20b75a010a8c68fc6927302afc86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/e457d346-6db9-41fb-a651-cb8c100ebd8e.png?resizew=144)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)求图中阴影部分表示的集合.
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解答题-问答题
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解题方法
【推荐2】指出下列各集合之间的关系,并用Venn图表示:
A={
是四边形},B={
是平行四边形},C={
是矩形},D={
是正方形}.
A={
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e6b477b1b936b3f6e69fd4a0c67814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e6b477b1b936b3f6e69fd4a0c67814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e6b477b1b936b3f6e69fd4a0c67814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e6b477b1b936b3f6e69fd4a0c67814.png)
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