1 . 在一副去掉大小王的52张扑克牌中随机抽取1张,记M表示事件“取到红桃”,N表示事件“取到J”,有以下说法:①M与N互斥;②M与N相互独立;③
与N相互独立.则上述说法中正确说法的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee035c6c34eef4268a150dab13117e9.png)
A.① | B.② | C.①② | D.②③ |
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2 . 下列叙述中,
①等差数列
,
为其前n项和,若
,
,则当
时,
最小;
②等差数列
的公差为d,前n项和为
,若
,则
为递增数列;
③等比数列
的前n项和为
,若
,则
有最小项;
④在等差数列
中,记
,若存在
,使得
,则
为递增数列.
正确说法有______ (写出所有正确说法的序号)
①等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b134439819d3069da709979cb9b1a991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5846713aaecbab35ad985cbe9ad7d44a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6cd3173d146902c5518503888c3b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
②等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
③等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5c8a6c196890aa7871ea0c82061ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
④在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134aefab10d3e81e223e9123da5f417e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f29c06a3e9a73e905eb87d71efa201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb50854126e66c09294192ed1db29ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
正确说法有
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解题方法
3 . 已知四边形
是椭圆
的内接四边形,其对角线
和
交于原点
,且斜率之积为
.给出下列四个结论:
①四边形
是平行四边形;
②存在四边形
是菱形;
③存在四边形
使得
;
④存在四边形
使得
.
其中所有正确结论的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeb11677994ba487096958b1ad82ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
③存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e84f14a77c27b015b6b1cf0896228b1.png)
④存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8d582c0bf83314b19df67e1bd2740.png)
其中所有正确结论的序号为
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2024-01-17更新
|
290次组卷
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3卷引用:北京市海淀区2023-2024学年高二上学期期末练习数学试卷
北京市海淀区2023-2024学年高二上学期期末练习数学试卷北京市人大附中2023-2024学年高二上学期期末数学试题(已下线)2.2.2 椭圆的性质(十八大题型)(分层练习)-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)
名校
解题方法
4 . 已知曲线
.关于曲线W有四个结论:
①曲线W既是轴对称图形又是中心对称图形;
②曲线W的渐近线方程为
;
③当
时曲线W为双曲线,此时实轴长为2;
④当
时曲线W为双曲线,此时离心率为
.
则所有正确结论的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb65152906dd85d99319f2aa0b8e9fe.png)
①曲线W既是轴对称图形又是中心对称图形;
②曲线W的渐近线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba80160fe41b335cd9e54fd449f8387.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c328c9c4ec69c4275e27576fb61655.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c328c9c4ec69c4275e27576fb61655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
则所有正确结论的序号为
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2024-01-26更新
|
152次组卷
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2卷引用:北京市通州区2023-2024学年高二上学期期末质量检测数学试卷
名校
5 . 在正方体
中,点
,
满足
,
,给出下列4个命题:
![](https://img.xkw.com/dksih/QBM/2021/11/8/2847094571835392/2847356345024512/STEM/fa726ef76df843c1b1b8a205f774df16.png?resizew=153)
①存在
,使
;
②存在
,使直线
与直线
共面;
③任意
,
的面积为定值;
④任意
,均有
.
其中,正确命题的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11819586164b4c8c61fc01199c65327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6db8a3fe1c37e9eee6207541f9347d.png)
![](https://img.xkw.com/dksih/QBM/2021/11/8/2847094571835392/2847356345024512/STEM/fa726ef76df843c1b1b8a205f774df16.png?resizew=153)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ee20f80fb0a9524662ce03f48e8157.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24006d28116bc097933cc90bcc0ea69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
③任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
④任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142c742a4226a2a6873bd55ca8b1f021.png)
其中,正确命题的序号为
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6 . 对于定义域为
的函数
,设关于
的方程
,对任意的实数
总有有限个根,记根的个数为
,给出下列命题:
①存在函数
满足:
,且
有最小值;
②设
,若
,则
;
③若
,则
为单调函数;
④设
,则
.
其中所有正确命题的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e258c0598cc43a382cce8bab8260a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6bd51117f63f7482ee9782fb9889b.png)
①存在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c34c1508ab9af5b2e5986652ba68da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc67984ac4e76c6f95b3fc885948fb29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138fa4ed39079099fcc80e10b5df6712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85187c85826beeca12137805293fff77.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc75ca9fbb27f0066677deb5d8f7220d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71595f31b25fcd5879783d89ab9b9bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4990c48f7ef2a3c9141679809307bbad.png)
其中所有正确命题的序号为
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2021-05-08更新
|
552次组卷
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4卷引用:北京市海淀区清华大学附属中学2022-2023学年高二下学期统练1(3月月考)数学试题
7 . 设集合
,点P的坐标为
,满足“对任意
,都有
”的点P构成的图形为
,满足“存在
,使得
”的点P构成的图形为
.对于下述两个结论:①
为正方形以及该正方形内部区域;②
的面积大于32.以下说法正确的为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03cd04b82dda9c0d2dd0957ffc407d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9712a0071f6d0d78d17ce18f6084cad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3693b84b83679c30b1035750d9b4f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deebd2c36a5e644a566f1980091359bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9712a0071f6d0d78d17ce18f6084cad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3693b84b83679c30b1035750d9b4f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e32039addb008103a2a8344225214a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deebd2c36a5e644a566f1980091359bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e32039addb008103a2a8344225214a.png)
A.①、②都正确 | B.①正确,②不正确 |
C.①不正确,②正确 | D.①、②都不正确 |
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8 . 学者森德拉姆(Sundaram)发现了一个有意思的素数筛法矩阵,这个矩阵后来在素数研究领域获得广泛应用.我们用
(
)表示矩阵中第i行第j列处的分量,这些分量之间满足如下递推关系:
,
,
,数表局部如下:
关于森德拉姆(Sundaram)素数筛法矩阵,有下列说法
①
; ②
;
③
; ④存在i,
使得
.
其中,所有正确说法的序号是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ba1bbe411bc71bca016d3fd82352f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8ad3cf001b89b9df5363d096eacee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6123377e52f8611dc24eccc0dc29bf40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04230dc33504a3af9682bfcdb71b0921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534a7166c49a9f39c31b5d92e66a5b42.png)
4 | 7 | 10 | 13 | 16 | 19 | … |
7 | 12 | 17 | 22 | 27 | 32 | … |
10 | 17 | 24 | 31 | 38 | 45 | … |
13 | 22 | 31 | 40 | 49 | 58 | … |
16 | 27 | 38 | 49 | 60 | 71 | … |
19 | 32 | 45 | 58 | 71 | 84 | … |
… | … | … | …… | … | … | … |
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10512e15a48cb2b27cc60a90086f94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01804f36afe15f0327cc8ae450b6294e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abebbae7edc68681b50c47aafd9d1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cfbd6f249dc98fdabe20ec58fbc467c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b00503e90e7f627e9c85f76d195a54.png)
其中,所有正确说法的序号是
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9 . 心脏线,也称心形线,是一个圆上的固定一点在该圆绕着与其相切且半径相同的另外一个圆周滚动时所形成的轨迹,因其形状像心形而得名.心脏线的平面直角坐标方程可以表示为
,
,则关于这条曲线的下列说法:
①曲线关于
轴对称;
②当
时,曲线上有4个整点(横纵坐标均为整数的点);
③
越大,曲线围成的封闭图形的面积越大;
④与圆
始终有两个交点.
其中,所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f770bc2ebb38834deaa6f99e43b3f997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
①曲线关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
④与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/244854b6b8c6e3b3f46ad4b53fa4017b.png)
其中,所有正确结论的序号是
您最近一年使用:0次
2022-01-12更新
|
779次组卷
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3卷引用:北京市房山区2021-2022学年高二上学期期末考试数学试题
10 . 合理使用密码是提升网络空间安全的重要手段.密码安全性强弱与其长度、使用字符种类数及排列规律等相关,其中字符可以是数字、字母及一些特殊符号等.某密码的安全性评分主要分为以下四个方面:
设密码安全性评分为
,若
为安全性较强;
为安全性中等;
为安全性较弱.
现有一个长度大于
个字符的密码,其安全性评分为
分,给出如下判断:
①该密码既含有小写字母又含有大写字母;
②该密码至少含有
个数字;
③该密码含多于
个特殊符号;
④该密码一定同时含有字母,特殊符号和数字.
其中所有正确判断的序号是___________ .
长度 | 小于等于![]() | ![]() ![]() | 大于等于![]() |
得![]() | 得![]() | 得![]() | |
字母 | 不含字母 | 含字母,全用小写或全用大写 | 含字母,既含小写又含大写 |
得![]() | 得![]() | 得![]() | |
特殊符号 | 不含符号 | 含![]() | 含大于![]() |
得![]() | 得![]() | 得![]() | |
数字 | 不含数字 | 含![]() ![]() | 含大于等于![]() |
得![]() | 得![]() | 得![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b43e3c1381250925b5c2db9a57796f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964cde277ed7a7b7e4693a5671f17ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3c53139328a2736b87c4d5975a65b2.png)
现有一个长度大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fd1dadbe1b2cafc0cf8b5bb8b18ed9.png)
①该密码既含有小写字母又含有大写字母;
②该密码至少含有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
③该密码含多于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
④该密码一定同时含有字母,特殊符号和数字.
其中所有正确判断的序号是
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