名校
解题方法
1 . 已知椭圆
的方程为
(常数
),点A为椭圆短轴的上顶点,点
是椭圆
上异于点A的一个动点.若动点
到定点A的距离的最大值仅在
点为短轴得另一顶点时取到,则称此椭圆为“圆椭圆”,已知
.
(1)若
,判断椭圆
是否为“圆椭圆”;
(2)若椭圆
是“圆椭圆”,求
的取值范围;
(3)已知椭圆
是“圆椭圆”,且
取最大值,点
关于原点
的对称点为点
(点
也异于点A),且直线
、
分别与
轴交于
、
两点.试问以线段
为直径的圆是否过定点?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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2023-04-13更新
|
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2卷引用:新疆维吾尔自治区乌鲁木齐市第八十中学2024届高三上学期11月月考数学试题
名校
解题方法
2 . 对于正实数
有基本不等式:
,其中
,为
的算术平均数,
,为
的几何平均数.现定义
的对数平均数:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b454c722316d2e530e935987adcb81.png)
(1)设
,求证:
:
(2)①证明不等式:
:
②若不等式
对于任意的正实数
恒成立,求正实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1f53d48a9ad9f88f4b3c14f2637d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b0bcbf744c3da99e6488f8e66cb8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee128ea692363f9a7b0cf0958e5f74e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b9514b5e245327b05261ac9a946063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b454c722316d2e530e935987adcb81.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/855eaf612ac4e4505948ee0a1c3c080e.png)
(2)①证明不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8188a2ffd328c07a359ea9be8102a70.png)
②若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0a551c4d6741cae6d513122166db90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aff93e03b22c6053550486ea4e911c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2022-05-11更新
|
493次组卷
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6卷引用:新疆昌吉州2022届高三第二次诊断性测试数学(理)试题
名校
3 . (1)已知直线l过点
,它的一个方向向量为
.
①求直线l的方程;
②一组直线
,
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b296d4b725e1f2f64006acc341c5be16.png)
都与直线l平行,它们到直线l的距离依次为d,
,
,
,
,
(
),且直线
恰好经过原点,试用n表示d的关系式,并求出直线
的方程(用n、i表示);
(2)在坐标平面上,是否存在一个含有无穷多条直线
,
,
,
,
的直线簇,使它同时满足以下三个条件:①点
;②
,其中
是直线
的斜率,
和
分别为直线
在x轴和y轴上的截距;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c08e02442990bfe60a716268b05d813.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce347708f4a80e748d55a3ea0e9a4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815bd3d2e51a8e2bacbd5ac89338b2ad.png)
①求直线l的方程;
②一组直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7c5e7bd6bac51402ffa04b4144ec78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b296d4b725e1f2f64006acc341c5be16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bc2b05dc79b18ecb4ac3f9b5c492d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57124599d0a72bf788f08ce442a85600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724a6337b5a90dec21e4c492cba4e1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e43b111af6a4599ed3da25ff08dfb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7c5e7bd6bac51402ffa04b4144ec78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d9c31eedf766d5a46ba973ebd9b37a.png)
(2)在坐标平面上,是否存在一个含有无穷多条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b40053ac4eac0c835c733924a0ad41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c62731e249e27fa0fad4d64fec7dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786bb10f13fc1f72b68e685d2abb20ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388ff911fd5c0cf97ef7303a9d5c87a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c08e02442990bfe60a716268b05d813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bc2b05dc79b18ecb4ac3f9b5c492d4.png)
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2019-12-11更新
|
569次组卷
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5卷引用:新疆维吾尔自治区乌鲁木齐市第四中学2024届高三上学期12月月考数学试题
新疆维吾尔自治区乌鲁木齐市第四中学2024届高三上学期12月月考数学试题新疆维吾尔自治区乌鲁木齐市第101中学2024届高三上学期12月月考数学试题上海市七宝中学2019-2020学年高二上学期期中数学试题(已下线)专题4.1 坐标平面上的直线【压轴题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)人教B版(2019) 选修第一册 过关检测 第二章 第2.2节综合把关练
名校
4 . 已知椭圆C的方程为
,
为椭圆C的左右焦点,离心率为
,短轴长为2.
![](https://img.xkw.com/dksih/QBM/2019/2/23/2146954398810112/2152054842490880/STEM/8018abdf99954f789af201b85fa52e33.png?resizew=218)
(1)求椭圆C的方程;
(2)如图,椭圆C的内接平行四边形ABCD的一组对边分别过椭圆的焦点
,求该平行四边形ABCD面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2019/2/23/2146954398810112/2152054842490880/STEM/8018abdf99954f789af201b85fa52e33.png?resizew=218)
(1)求椭圆C的方程;
(2)如图,椭圆C的内接平行四边形ABCD的一组对边分别过椭圆的焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
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2019-03-02更新
|
1060次组卷
|
4卷引用:新疆生产建设兵团第二中学2019-2020学年高三上学期第一次月考数学(理)试题