名校
解题方法
1 . 已知椭圆
的左、右焦点分别为
,
,过点
的直线l与椭圆C交于P,Q两点.若
,且
,则C的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5434e009c041c4ee3af96a03d74bb24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96002251342254c34eb56b9bc232b25b.png)
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解题方法
2 . 已知椭圆
的左右焦点分别为
,以线段
为直径的圆过C的上下顶点,点
在C上,其中e为C的离心率.
(1)求椭圆C的方程和短轴长;
(2)点
在C上,且在x轴的上方,满足
,直线
与直线
的交点为P,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93c13c9d1a1f85ab7a9b044c669bf53.png)
(1)求椭圆C的方程和短轴长;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291255fbc4b2ac36e445fc090bd539b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86dbcf83cd5d3421b3eed7be7dab32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbad65b3d744b70da2480eee1cdb587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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2024-06-10更新
|
556次组卷
|
2卷引用:2024届河北省承德市部分示范高中高三三模数学试题
名校
3 . 已知一个装有半瓶水的圆柱形玻璃杯,其底面半径为
,玻璃杯高为
(玻璃厚度忽略不计),其倾斜状态的正视图如图所示,
表示水平桌面.当玻璃杯倾斜时,瓶内水面为椭圆形,阴影部分
为瓶内水的正视图.设
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68f35b8432dad8fad85309c42f4d2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fa622aae9a94f518967806eaec9544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53abbd672b82a02c4975f99fbbd2c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70732cfd9e5e332e0fc1c1575a7ab2d.png)
A.当![]() ![]() |
B.当椭圆的离心率最大时,![]() |
C.当椭圆的焦距为4时,![]() |
D.当![]() |
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解题方法
4 . 已知
为椭圆
的左、右焦点,过
的直线与
交于
两点,若
,则
的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628847a510dc72acd37da2887e93cf6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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2024-06-08更新
|
468次组卷
|
2卷引用:河北省沧州市部分高中2024届高三下学期二模考试数学试题
解题方法
5 . 已知椭圆
的左、右焦点分别为
,过
向圆
引切线交椭圆于点
为坐标原点,若
,则椭圆的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5329f09c10b5bfec6504c3a5a92e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876f208635a511c8dc89da1dad21c868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea0eca9162902e3fb14fdc3640961297.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
6 . 椭圆
的左、右顶点分别为
,点
在椭圆上第一象限内,记
,存在圆
经过点
,且
,则椭圆
的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f04443a0c1cf4808aea741c9f9379b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeab4cb28085f2fc9f058656e03352c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01225eca2322a6136314dedadcafa994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bde656c56535b611568bdf754986fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2024-05-16更新
|
392次组卷
|
2卷引用:河北省沧州市2024届高三下学期6月保温考试数学试卷
解题方法
7 . 已知椭圆
的左、右焦点分别为
是
上的点,且在第一象限,
是
的角平分线,过点
作
的垂线,垂足为
,若
,则
的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ed463bf16c78a4bbb9d3acff922afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269f53fde67a19ef4254a077a95c6190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知椭圆
的离心率为
是
上任意一点,
为坐标原点,
到
轴的距离为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069ffc1e3936d254303d588e1a70a3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2147cbf0ad4d651a1933f09307055cba.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-04-18更新
|
761次组卷
|
3卷引用:河北省邢台市2024届高三下学期教学质量检测(一)数学试题
解题方法
9 . 数学家Geminad Dandelin用一平面截圆锥后,在圆锥内放两个大小不同的小球,使得它们分别与圆锥侧面、截面相切,就可证明图中平面截圆锥得到的截面是椭圆(如图称为丹德林双球模型).若圆锥的轴截面为正三角形,则用与圆锥的轴成
角的平面截圆锥所得椭圆的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
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10 . 已知椭圆
的左、右焦点分别为
,
,P为椭圆T上一点,且
,若
的外接圆面积是其内切圆面积的25倍,则椭圆T的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b76e364a93cd78537c6c97b88021f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d124b231bf2cd3746f35e6c68cd7178f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
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