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1 . 若
,则称
是关于x,y的方程
的整数解.关于该方程,下列判断错误 的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40c81308e49d61ac1e98b9ba48a6ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b4f86e48e2b0d63c1865c60ed1e4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7a85679aac8db77ae690199c1dad7c.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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名校
2 . 对于圆
上任意一点
,当
时,
的值与
,
无关,有下列结论:
①点
的轨迹是一个圆; ②点
的轨迹是一条直线;
③当
时,
有最大值
; ④当
,
时,
.
其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d787ea5d978055cb757286937e5bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d9712c3b25f3030e166e136d3a4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772225b895e16cc15e03293ba4a4ac6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a78aae223991954a893ea4ec42833a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45767ebe3415761178db9b024da09b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c34653ee0f201559c6086773137382.png)
其中正确的个数是( )
A.1 | B.2 | C.3 | D.4 |
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2023-01-14更新
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7卷引用:第2章 圆锥曲线 单元综合检测(难点)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
(已下线)第2章 圆锥曲线 单元综合检测(难点)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)上海市育才中学2022-2023学年高二上学期期末数学试题(已下线)高二上学期期中考试选择题压轴题50题专练-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)江苏省扬州市新华中学2023-2024学年高二上学期10月月考数学试题上海市闵行区闵行中学2024届高三上学期12月月考数学试题上海市杨浦高级中学2023-2024学年高二下学期期中考试数学试卷(已下线)专题03 圆 曲线与方程(九大题型+优选提升题)-【好题汇编】备战2023-2024学年高二数学下学期期末真题分类汇编(沪教版2020选择性必修,上海专用)
3 . 设集合
是集合
的子集,对于
,定义
,给出下列三个结论:①存在
的两个不同子集
,使得任意
都满足
且
;②任取
的两个不同子集
,对任意
都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1937b473e0054efd86946d7f1e166656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1979a813cd49d4ce8498a7d28cebb4.png)
;③任取
的两个不同子集
,对任意
都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59d87c83901169dbc36187cafcad46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4619824c799fccaade38170b499a8504.png)
;其中,所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b384d54d989c2762e3e9a4e00a70442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f1373f0a8753574639ca51553b8e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef485ffe3dba1f6ddd485e928791e83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b384d54d989c2762e3e9a4e00a70442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f1373f0a8753574639ca51553b8e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15adf94a9e03ae232335f6fa1b99a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d714d900ed955a451ee980623d980757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b384d54d989c2762e3e9a4e00a70442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f1373f0a8753574639ca51553b8e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1937b473e0054efd86946d7f1e166656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1979a813cd49d4ce8498a7d28cebb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e718f107d7a4548536ba6a6ea7ae16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b384d54d989c2762e3e9a4e00a70442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f1373f0a8753574639ca51553b8e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59d87c83901169dbc36187cafcad46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4619824c799fccaade38170b499a8504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e718f107d7a4548536ba6a6ea7ae16.png)
A.①② | B.②③ | C.①③ | D.①②③ |
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|
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13卷引用:第1章 集合与常用逻辑用语-【优化数学】单元测试能力卷(人教B版2019)
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4 . 下列四个命题,其中真命题的序号是_______________ .
(1)
得最小值为2;
(2)
且
,则
恒成立;
(3)
,则
恒成立;
(4)
,其中
表示
三数中最大的一个数,则
的最小值为
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22f0df337cc77b4124546d1acb08ed4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077a31bd2b8e26c35bfd855e42b5d7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22404ecc9b3ef48f2674c905008521bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba81d5fb9b83fef07f1420e1a3ace59.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4267dc8e500cecea41f8c252af19e34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475bc2e5ea93f868daee34e44cc4c70e.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476a1cea8bb4fec33606f3f75a80ee73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62f3f1d721cbf7a5d3fb5678b9a6349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067988c058392f4132c82c13e7e7e4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33732f816538fc8d3e5f587a362c8108.png)
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