解题方法
1 . 已知椭圆
的左、右焦点分别为
,直线
与椭圆
相交于
两点.有下列结论:
①四边形
为平行四边形;
②若
轴,垂足为
,则直线
的斜率为
;
③若
(
为坐标原点),则四边形
的面积为
;
④若
,则椭圆的离心率可以是
.
其中错误结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475a3fdc7b27d5ffa8c864dc478903d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b343d77ee4dced82ecc479206c42977d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfffd420523729074995e9e55f464d4c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8178c63d125ee6235feeb2fc70d02745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7500ce8bce3d902c25c224de4c44bd7.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105dcc84f3af3a23d2638f7831678180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfffd420523729074995e9e55f464d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9766e5e316ac8e8ecae1779070799a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
其中错误结论的个数是( )
A.1 | B.2 | C.3 | D.0 |
您最近一年使用:0次
解题方法
2 . 过椭圆C:
上的点
,
分别作C的切线,若两切线的交点恰好在直线
:
上,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6a6297f8414ef9d5af1de2d3343750.png)
A.![]() | B.![]() | C.-9 | D.![]() |
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名校
3 . “蒙日圆”涉及几何学中的一个著名定理,该定理的内容为:椭圆上两条互相输出垂直的切线的交点必在一个与椭圆同心的圆上,该圆称为椭圆的蒙日圆.若椭圆C:
的离心率为
,则椭圆C的蒙日圆的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482ed5e745e2ca477096307d0515b602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-05-02更新
|
976次组卷
|
5卷引用:陕西省西安市长安区第一中学2023届高三二模数学试题
陕西省西安市长安区第一中学2023届高三二模数学试题辽宁省大连市第八中学2023届高考适应性测试数学试题(已下线)第02讲 3.1.2椭圆的简单几何性质(1)(已下线)压轴题圆锥曲线新定义题(九省联考第19题模式)练(已下线)专题17 圆锥曲线常考压轴小题全归类(16大题型)(练习)
名校
4 . 平行四边形ABCD内接于椭圆
,椭圆C的离心率为
,且AB,AD的倾斜角分别为
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd39d96d8e5e929cd9b85245a752fbe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e3a7d1e6b34790ec548889970080ed0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
5 . 设
的最小值为
,最大值为
,若正数
,
满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea61421b89cb435a3d58366efc81b80a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e2ff23fe78bb1fab9059f68fa6a8e3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
6 . 中国国家大剧院是亚洲最大的剧院综合体,中国国家表演艺术的最高殿堂,中外文化交流的最大平台.大剧院的平面投影是椭圆
,其长轴长度约为
,短轴长度约为
.若直线
平行于长轴且
的中心到
的距离是
,则
被
截得的线段长度约为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/2ee257ff-b581-4a37-86fa-abaf5b28c6c5null?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a91e28d4bf7d04e4a79d1e120b05ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bd8975741c7e768d21ee09a1f0de11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dee2e8849924124cbb31f9c6f15479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-04-24更新
|
3164次组卷
|
5卷引用:江苏省决胜新高考2023届高三下学期4月大联考数学试题
7 . 定义:圆锥曲线
的两条相互垂直的切线的交点
的轨迹是以坐标原点为圆心,
为半径的圆,这个圆称为蒙日圆.已知椭圆
的方程为
,
是直线
上的一点,过点
作椭圆
的两条切线与椭圆相切于
、
两点,
是坐标原点,连接
,当
为直角时,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da001dad7941e6c9858637d7b62cec59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82766cfd2b7c59c7fac5b827ae5863b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2801bb773af735fc9c0239d19c20e6e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be177ab36c4e3fc656cfcdb7a34f8edc.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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解题方法
8 . 已知直线
与抛物线
交于点
、
,以线段
为直径的圆经过定点
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d87775f61dc7171d2827f9d111f9ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269a51e0f77f63bae2df3dc8b1d4f455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-03-29更新
|
792次组卷
|
5卷引用:四川省乐山市2023届高三下学期第二次调查研究考试数学(理)试题
解题方法
9 . 已知椭圆E
,直线
与椭圆E相切,则椭圆E的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b68bed5f53ce98a19785d81b7ca2336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a16a128d07b4d4232f79d013c14ad2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-28更新
|
1276次组卷
|
5卷引用:湖南省常德市2023届高三下学期一模数学试题
湖南省常德市2023届高三下学期一模数学试题专题17平面解析几何(单选题)(已下线)3.1.2 椭圆的简单几何性质(精练)-2023-2024学年高二数学《一隅三反》系列(人教A版2019选择性必修第一册)(已下线)第五节 椭圆 第二课时 直线与椭圆的位置关系 B素养提升卷(已下线)专题12 椭圆-2
解题方法
10 . 青花瓷又称白地青花瓷,常简称青花,中华陶瓷烧制工艺的珍品,是中国瓷器的主流品种之一,属釉下彩瓷.如图为青花瓷大盘,盘子的边缘有一定的宽度且与桌面水平,可以近似看成由大小两个椭圆围成.经测量发现两椭圆的长轴长之比与短轴长之比相等.现不慎掉落一根质地均匀的长筷子在盘面上,恰巧与小椭圆相切,设切点为
,盘子的中心为
,筷子与大椭圆的两交点为
、
,点
关于
的对称点为
.给出下列四个命题:
①两椭圆的焦距长相等;
②两椭圆的离心率相等;
③
;
④
与小椭圆相切.
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/b0dab7ba-ec54-4f03-87b0-4b1dc37f5fa1.png?resizew=191)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①两椭圆的焦距长相等;
②两椭圆的离心率相等;
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f30acc34f4ee1077532ae6808af2ab2.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/b0dab7ba-ec54-4f03-87b0-4b1dc37f5fa1.png?resizew=191)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次