1 . 群的概念由法国天才数学家伽罗瓦(1811-1832)在19世纪30年代开创,群论虽起源于对代数多项式方程的研究,但在量子力学、晶体结构学等其他学科中也有十分广泛的应用.设
是一个非空集合,“
”是一个适用于
中元素的运算,若同时满足以下四个条件,则称
对“
”构成一个群:(1)封闭性,即若
,则存在唯一确定的
,使得
;(2)结合律成立,即对
中任意元素
都有
;(3)单位元存在,即存在
,对任意
,满足
,则
称为单位元;(4)逆元存在,即任意
,存在
,使得
,则称
与
互为逆元,
记作
.一般地,
可简记作
可简记作
可简记作
,以此类推.正八边形
的中心为
.以
表示恒等变换,即不对正八边形作任何变换;以
表示以点
为中心,将正八边形逆时针旋转
的旋转变换;以
表示以
所在直线为轴,将正八边形进行轴对称变换.定义运算“
”表示复合变换,即
表示将正八边形先进行
变换再进行
变换的变换.以形如
,并规定
的变换为元素,可组成集合
,则
对运算“
”可构成群,称之为“正八边形的对称变换群”,记作
.则以下关于
及其元素的说法中,正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c66701407d942ef38d482e6b3ffd7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c66701407d942ef38d482e6b3ffd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9cbad1e8b405feac6e8fe403f024b8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d4a6cf11cda87b3dfafaecdec683f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c66701407d942ef38d482e6b3ffd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4424f7a126daa000c5940787ee564521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4424f7a126daa000c5940787ee564521.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() |
D.![]() |
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2 . 通常我们把一个以集合作为元素的集合称为族.若以集合
的子集为元素的族
,满足下列三个条件:(1)
和
在
中;(2)
中的有限个元素取交后得到的集合在
中;(3)
中的任意多个元素取并后得到的集合在
中,则称族
为集合
上的一个拓扑.已知全集
为
的非空真子集,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552911fcffb0021a8572e82bfa6648de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb584b83ae783a0ec8a9b4628b7fca3e.png)
A.族![]() ![]() |
B.族![]() ![]() |
C.族![]() ![]() |
D.若族![]() ![]() ![]() ![]() ![]() ![]() |
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3 .
,集合
,若
,
分别为集合
,
的元素个数,则下列结论可能的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3eb9b6fe8959ae9e71e857b6d6fed49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a4d2951973a95b322439ee2200a3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911cdb689ca80557ce076cb49b3ee498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed8b92060201044355374332201a612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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4 . 设数集
满足下列两个条件:(1)
;(2)
,若
则
. 则下论断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8518dab1e2a5525a4311a8cca1700cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56e6a5f7c06d61bc833ac4bcb61b89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac8c98b4e75cc7d3a018a9ec34ee522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11a069688e4c797fcf527eab15afa82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8551a883fdf0a472d21a5aff7b080005.png)
A.![]() |
B.a,b,c,d中必有一个为1 |
C.若![]() ![]() ![]() |
D.![]() ![]() |
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名校
解题方法
5 . 对于正整数集合
,如果去掉其中任意一个元素
之后,剩余的所有元素组成的集合都能分为两个交集为空集的集合,且这两个集合的所有元素之和相等,就称集合
为“可分集”,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be9dcd867996d7db00fb850227a871d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efee470d0232b6b37f2fb2ab15aae0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() |
B.集合![]() |
C.若集合![]() ![]() |
D.若集合![]() ![]() |
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2022-10-14更新
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1261次组卷
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4卷引用:重庆市西南大学附属中学校2022-2023学年高一上学期第一次阶段性考试数学试题
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