名校
1 . 已知四边形
为矩形,
,
为
的中点,将
沿
折起,得到四棱锥
,设
的中点为
,在翻折过程中,得到如下有三个命题:
①
平面
,且
的长度为定值
;
②三棱锥
的最大体积为
;
③在翻折过程中,存在某个位置,使得
.
其中正确命题的序号为__________ .(写出所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc28e69c1ba0aac981256887f7dfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1e88b36ff71fe69c07bade0f95f1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519862a321d8067fb18dd2af1affb2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f214481e6b23307a37940f6dd0313d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48856dc77af21bf856c6ea77a9077e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2237c2fbad38af97db3f35f7d7e83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
③在翻折过程中,存在某个位置,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b245e1ed221af9abc5c845face3a56.png)
其中正确命题的序号为
您最近一年使用:0次
2019-08-02更新
|
4241次组卷
|
17卷引用:上海市位育中学2021-2022学年高二上学期期中数学试题
上海市位育中学2021-2022学年高二上学期期中数学试题内蒙古赤峰市2018-2019学年高二下学期期末联考数学(理)试题山东省淄博市桓台第一中学2019-2020学年高一下学期期中考试数学试题四川省南充高级中学2020-2021学年高二上学期第二次月考数学(文)试题(已下线)第01讲 空间直线与平面(核心考点讲与练)(2)2019年河北唐山市区县高三上学期第一次段考数学(文)试题2019年河北唐山市区县高三上学期第一次段考数学(理)试题宁夏回族自治区银川市宁一中2019-2020学年高三12月月考数学(理)试题河北省衡水市武邑县2019-2020学年高三上学期12月月考数学(理)试题(已下线)2020届高三12月第02期(考点07)(理科)-《新题速递·数学》2020届甘肃省河西五市部分普通高中高三第一次联合考试数学理科试卷(已下线)强化卷05(3月)-冲刺2020高考数学之拿高分题目强化卷(山东专版)内蒙古赤峰二中2021-2022学年高三上学期第一次月考数学(理)试题(已下线)专题06 立体几何(文)第二篇-备战2020高考数学黄金30题系列之压轴题(新课标版)(已下线)专题06 立体几何(理)第二篇-备战2020高考数学黄金30题系列之压轴题(新课标版)北京市海淀区2023届高三一模数学试题查漏补缺练习(已下线)第10讲空间直线、平面的平行(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(原卷版)
21-22高二·江苏·课后作业
名校
2 . 对于不等式
,某同学用数学归纳法证明的过程如下:
①当
时,
,不等式成立;
②假设当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
时,不等式成立,即
,
则当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287a03d6baf51d1ca7bbbc700e8fcf9d.png)
.
故当
时,不等式成立.
则下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788f0aeda158acbd74806049081c2d89.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04af9509459b72021abbaa87f272db.png)
②假设当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f6b1237dd038b15a2bce8d68bb7177.png)
则当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287a03d6baf51d1ca7bbbc700e8fcf9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c228487e3189a83888e5dd56a05b76.png)
故当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
则下列说法错误的是( )
A.过程全部正确 | B.![]() |
C.![]() | D.从![]() ![]() |
您最近一年使用:0次
2021-11-21更新
|
229次组卷
|
4卷引用:江西省宜春市丰城市东煌学校2023-2024学年高二下学期4月期中考试数学试题
江西省宜春市丰城市东煌学校2023-2024学年高二下学期4月期中考试数学试题(已下线)4.4 数学归纳法-2021-2022学年高二数学尖子生同步培优题典(苏教版2019选择性必修第一册)1.5数学归纳法检测A卷(基础巩固)1.5数学归纳法测试卷
名校
3 . 给出下列三种说法:
①命题p:∃x0∈R,tan x0=1,命题q:∀x∈R,x2-x+1>0,则命题“p∧(
)”是假命题.
②已知直线l1:ax+3y-1=0,l2:x+by+1=0,则l1⊥l2的充要条件是
=-3.
③命题“若x2-3x+2=0,则x=1”的逆否命题为“若x≠1,则x2-3x+2≠0”.
其中所有正确说法的序号为________________ .
①命题p:∃x0∈R,tan x0=1,命题q:∀x∈R,x2-x+1>0,则命题“p∧(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
②已知直线l1:ax+3y-1=0,l2:x+by+1=0,则l1⊥l2的充要条件是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
③命题“若x2-3x+2=0,则x=1”的逆否命题为“若x≠1,则x2-3x+2≠0”.
其中所有正确说法的序号为
您最近一年使用:0次
2016-12-05更新
|
991次组卷
|
6卷引用:2016-2017学年河北馆陶县一中高二上期中数学试卷
2016-2017学年河北馆陶县一中高二上期中数学试卷江西省会昌中学2018-2019学年高二上学期第一次月考数学(理)试卷辽宁省沈阳市郊联体2018-2019 学年高二上学期数学(文科)期末试题黑龙江省海林市朝鲜族中学高三数学人教版选修1-1同步练习:第一章 常用逻辑用语单元测评(已下线)专题1.3 简单的逻辑联结词、全称量词与存在量词(精练)-2021年高考数学(文)一轮复习学与练广西壮族自治区钦州市第四中学2023届高三上学期9月考试数学(文)试题
名校
4 . 给出下列命题
①空间中所有的单位向量都相等;②方向相反的两个向量是相反向量;
③若
满足
,且
同向,则
;
④零向量没有方向;⑤对于任意向量
,必有
.
其中正确命题的序号为( )
①空间中所有的单位向量都相等;②方向相反的两个向量是相反向量;
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f5387de0f89c529cfd8239130d38f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c3b11072fd018df3878bec474f7f91.png)
④零向量没有方向;⑤对于任意向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213a914bbd35e90d87fdd745c51fa9bd.png)
其中正确命题的序号为( )
A.①②③ | B.⑤ | C.④⑤ | D.①⑤ |
您最近一年使用:0次
2021-09-03更新
|
1633次组卷
|
6卷引用:安徽省六安市新安中学2021-2022学年高二上学期期中数学试题
名校
5 . 给出下列命题:其中正确命题的序号为__________ .
①若
,则
;
②若
、
,且
,则
;
③若
,则
是纯虚数;
④若
,则
对应的点在复平面内的第一象限.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255483db09b1e523a4fcc1f618b98ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a3363aaa23cf3d6e1a0a637e29ba64.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47f2009bcbf3cb4906e4e7e969ad87b.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a33c24b61fbdbf3b55842ec8391bd9.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c36e5c7a7b9f386dbcadd5bbb572d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62bee3bbef602b12f783c95616a35aa7.png)
您最近一年使用:0次
2019-11-13更新
|
328次组卷
|
4卷引用:上海市上海交通大学附属中学2016-2017学年高二下学期期中数学试题
18-19高二下·上海·期中
名校
6 . 已知直线
及平面
,下列命题中:
①
;②
;③
;④
.
所有正确命题的序号为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae455e98b1504510d335d2d3fa750eac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93e74286fb669d945e4a506a51a2cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1002f45f6a74b22ae99437f9e76baed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ed3911a6114565b9ce3093df042f6f.png)
所有正确命题的序号为
您最近一年使用:0次
名校
7 . 下列结论:
“直线l与平面
平行”是“直线l在平面
外”的充分不必要条件;
若p:
,
,则
:
,
;
命题“设a,
,若
,则
或
”为真命题;
“
”是“函数
在
上单调递增”的充要条件.
其中所有正确结论的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876959b9f90f2379cf3d0927a8e31005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bded4e08a5c75fd82f1868c9f4c5b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3719d2ca3c5877bafc18f58c1fdf4b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4690a619a829c621fb7cd1e98df13f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdf492b48e5da4602f2bde199deae4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bc9e7fe40882f2f79bcf8d87a7f031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67773252101fb3704fdac88b5f3f1bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bea9391c115618bb84a7aa3da8a242d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60dbdf0c087ab6be44595a5ca285acbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd594e99f82b7736c44e18b2721e607f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10baec9d907f3ccb3f64ad3de53a589d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74269cfb503e736149e1ac3165fcbafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89e1ee3b8e2751f354aa5ab7135c75b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b3de9d6894829d7de515544cd6cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8fe868d4152f599a9ae5a0dae150cb0.png)
其中所有正确结论的序号为
您最近一年使用:0次
2019-03-18更新
|
638次组卷
|
3卷引用:甘肃省平凉市静宁县第一中学2019-2020学年高二上学期期中数学(文)试题
8 . 在下列给出的命题中,所有正确命题的序号为____________ .
①若
为互斥事件,则
;
②若
,则
成等比数列;
③经过两个不同的点
、
的直线都可以用方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4987b682f2616cf2d3363c0409e3006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4954bf80c348915da86a442e1c912b95.png)
来表示;
④若函数
对一切
满足:
,则函数
为奇函数或偶函数;
⑤若函数
有两个不同的零点
,则
.
①若
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/d36378b1a4444f95af26d11c5fa79f6e.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/45db5892819b4f02ab5b9f03edfecc2f.png?resizew=108)
②若
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/7ee33a1e3fba43df9731ba4f8efe0cd4.png?resizew=51)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/94e995d0e55d4891a80f86073aef3f7c.png?resizew=40)
③经过两个不同的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec391f08f1452fb3e0aebe7e12ba4fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a4422395ca20fe847419ec569e48b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4987b682f2616cf2d3363c0409e3006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4954bf80c348915da86a442e1c912b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41939a729cdeb8e79b9e9bd3fae11fb.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/140d5d745c4349fda7a8d1c68d90b7db.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/e6eda5a6e2ca480883e4177f3f1121d3.png?resizew=36)
⑤若函数
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/185b8378da4a44c7997e903c715dacfa.png?resizew=137)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/6a113b06ab2b42359077821fdbb05127.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572383539773440/1572383545827328/STEM/bd596a32f8d5488fb6af21a5b7bbff70.png?resizew=60)
您最近一年使用:0次
9 . 已知命题
:“若
,则
有实数解”的逆命题;命题
:“若函数
的值域为
,则
”.以下四个结论:
①
是真命题;②
是假命题;③
是假命题;④
为假命题.
其中所有正确结论的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f160cc4fd73afd64c14af6d355aa84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53bbfbb39affc80bec7148c0595cbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3de3c22cb75669ec3526f82a946937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751afe327bd2cd6e0d2336556ee5aded.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094543346d88c4ed45c1b1fb91f5265b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba854cbca86f7a9350d0ee5e19160c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9aacc4fa7d44974d18a3fb9e290b5c.png)
其中所有正确结论的序号为
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