1 . 已知椭圆
的右焦点为
,其四个顶点的连线围成的四边形面积为
;菱形
内接于椭圆
.
(1)求椭圆
的标准方程;
(2)(ⅰ)坐标原点
在边
上的投影为点
,求点
的轨迹方程;
(ⅱ)求菱形
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)(ⅰ)坐标原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(ⅱ)求菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
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解题方法
2 . 已知平面内定点
是以
为直径的圆
上一动点(
为坐标原点).直线
与点
处
的切线交于点
,过点
作
轴的垂线
,垂足为
,过点
作
轴的垂线
,垂足为
,过点
作
的垂线
,垂足为
.
(1)求点
的轨迹方程
;
(2)求矩形
面积的最大值;
(3)设
的轨迹
,直线
与
轴围成面积为
,甲同学认为随
的增大,
也会达到无穷大,乙同学认为随
的增大
不会超过4,你同意哪个观点,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d89c84f89fdb91c6ea75281afb0a835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(2)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec780e86f57790cf88ec761e219bf5f.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fbf172a91af29e4e1b736014ee9f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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名校
3 . 在边长为2的正方体
中,动点
满足
,
且
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b93364f416d0ceadcc84387ae12e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722cf568777f083d83424c02c5890825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f59b580adf6193c35d22749499280a.png)
A.当![]() ![]() ![]() |
B.当![]() ![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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2024-02-24更新
|
2096次组卷
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6卷引用:专题04 立体几何
(已下线)专题04 立体几何广西壮族自治区南宁市第三中学、柳州高级中学2024届高三下学期一轮复习诊断性联考数学试卷(已下线)压轴小题7 探究立体几何中的动态问题湖南省邵阳市邵东市第一中学2023-2024学年高二下学期3月月考数学试题(已下线)压轴题04立体几何压轴题10题型汇总-1河南省信阳市新县高级中学2024届高三考前第六次适应性考试数学试题
名校
解题方法
4 . 在平面直角坐标系
中,点
为动点,以
为直径的圆与
轴相切,记
的轨迹为
.
(1)求
的方程;
(2)设
为直线
上的动点,过
的直线与
相切于点
,过
作直线
的垂线交
于点
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0683709d28ed67ae6fcecc75878b0b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
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2024-02-24更新
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2211次组卷
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7卷引用:专题07 直线与圆、圆锥曲线
(已下线)专题07 直线与圆、圆锥曲线(已下线)信息必刷卷05黑龙江省齐齐哈尔市2024届高三第一次模拟考试数学试题(已下线)第四套 最新模拟复盘卷山西省怀仁市第一中学校2023-2024学年高三下学期第三次模拟考试数学试题(已下线)信息必刷卷04(江苏专用,2024新题型)江苏省盐城市2023-2024学年高二下学期5月月考数学试题
名校
解题方法
5 . 已知正方体
的棱长为2,点P在正方形ABCD内运动(含边界),则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/29b626d1-eb5a-4733-b26f-b764f92f96df.png?resizew=142)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/29b626d1-eb5a-4733-b26f-b764f92f96df.png?resizew=142)
A.存在点P,使得![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-02-17更新
|
1364次组卷
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4卷引用:河北省唐山市2022-2023学年高二上学期期末数学试题
河北省唐山市2022-2023学年高二上学期期末数学试题(已下线)模块四 专题1 重组综合练(河北)期末终极研习室(高二人教A版)(已下线)第一章 空间向量与立体几何(压轴题专练,精选20题)-2023-2024学年高二数学单元速记·巧练(人教A版2019选择性必修第一册)广东省东莞市东华高级中学2022-2023学年高二下学期期中考试数学试卷
22-23高三·河北·阶段练习
名校
6 . 已知点
到点
的距离比到
轴的距离大1,记点
的轨迹为
.直线
与椭圆
相切.
与
在第一象限的交点为
,且曲线
在点
处的切线斜率乘积为
.设
的上,左顶点为
.将直线
与
围成的图形绕
轴旋转
形成一个旋转体,则该旋转体的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7769b4ee449622c2b860cb765409f109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdba36d4c2d4acedbd44d08e4c04127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18839917069b4ce917a77b653c85003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384b3248b6c1f724dbe653fb1c84153.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 如图,在棱长为4的正四面体ABCD中,E,F分别在棱DA,DC上,且EF
AC,若
,
,
,则下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/7267cb4b-1210-41a7-be43-8476f51b6f41.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a89927311249c7197ca61e331ac704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7051babfc84ce76c79e367b3b5ab273c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d1b979659b047fd677c7c01aaf1002.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/7267cb4b-1210-41a7-be43-8476f51b6f41.png?resizew=169)
A.![]() | B.![]() ![]() |
C.若![]() | D.![]() ![]() ![]() |
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2022-01-12更新
|
1688次组卷
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5卷引用:河北省石家庄市第二中学2023届高三下学期4月月考数学试题
河北省石家庄市第二中学2023届高三下学期4月月考数学试题湖北省武汉市部分重点中学2021-2022学年高二上学期期中联考数学试题湖北十堰市部分普通高中2023-2024学年高二上学期11月期中数学试题(已下线)考点14 立体几何中的动态问题 2024届高考数学考点总动员【练】(已下线)第二章 立体几何中的计算 专题一 空间角 微点9 二面角大小的计算(四)【培优版】
名校
解题方法
8 . 如图,曲线y2=x(y≥0)上的点P1与x轴的正半轴上的点Qi及原点O构成一系列正三角形,△OP1Q1,△Q1P2Q2,…,△Qn﹣1PnQn…设正三角形Qn﹣1PnQn的边长为an,n∈N*(记Q0为O),Qn(Sn,0).数列{an}的通项公式an=_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/befe99df-b658-421c-b586-e7753d0d746d.png?resizew=239)
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2020-03-25更新
|
2230次组卷
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12卷引用:2020届河北省衡水中学高三下学期一调考试数学文科试题
2020届河北省衡水中学高三下学期一调考试数学文科试题安徽省六安市第一中学2018-2019学年高一下学期期末数学(理)试题(已下线)2020届高三3月第01期(考点06)(文科)-《新题速递·数学》(已下线)第2章+数列(能力提升)-2020-2021学年高二数学单元测试定心卷(苏教版必修5)(已下线)第二章+数列(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)考点29 抛物线-2021年新高考数学一轮复习考点扫描(已下线)专题7.18 数列与解析几何的综合-2022届高三数学一轮复习精讲精练湖南省湘潭一中2019-2020学年高三上学期11月月考理科数学试题(已下线)专题26 数列的通项公式-5(已下线)专题02 数列(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10 数列通项公式的求法 微点1 观察法(不完全归纳法)、公式法福建省泉州市泉港区第一中学2023-2024学年高二上学期第二次月考数学试题
名校
9 . 点
为正方体
的内切球
球面上的动点,点
为
上一点,
,若球
的体积为
,则动点
的轨迹的长度为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e731ef1ccc1bded5eb2ea551cd79a12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee3bd4ced831e9000e71ef68c44ac3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2017-05-21更新
|
3678次组卷
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4卷引用:河北省衡水中学2017届高三下学期第二次摸底考试数学(理)试题