名校
解题方法
1 . 如图,已知椭圆
的左、右焦点分别为
,过椭圆左焦点
的直线与椭圆
相交于
两点,
,
,则椭圆
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3324199c6751f2e0e6d8542783b0d957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c388f94adc940de0fd317d00b3cd9f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040b10c7d1c56f08e3d31a61195c689a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/a1e3ab5b-2a04-417e-aeee-b7ba4905e233.png?resizew=165)
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2024-01-25更新
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322次组卷
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5卷引用:甘肃省庆阳市环县第一中学2023-2024学年高二上学期期末考试数学试题
解题方法
2 . 若椭圆
的长轴长、焦距、短轴长成等差数列,则该椭圆的离心率是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
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名校
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3 . 已知
为椭圆:
(
)上一点,
,
为左、右焦点,设
,
,若
,则该椭圆的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e49877a18188a806e5bc312264796bf.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280d2a6b2a0d45904635f528319fc635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f1ea4a7412e643e4b47263e434f2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3267f5af8b2f64309db15a2eb1afc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e49877a18188a806e5bc312264796bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/ffb78fce-cf8b-4c06-a6ab-95864f9f4377.png?resizew=172)
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2024-01-10更新
|
1311次组卷
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5卷引用:湖南省大联考长沙市一中2024届高三上学期月考数学试卷(五)
湖南省大联考长沙市一中2024届高三上学期月考数学试卷(五)湖南省长沙市第一中学2024届高三上学期月考数学试卷(五)江西省赣州市南康中学2024届高三上学期七省联考考前数学猜题卷(九)(已下线)考点12 三角恒等变换公式的综合应用 --2024届高考数学考点总动员【讲】江西省宜春市丰城市第九中学2023-2024学年高一上学期期末数学试题
名校
解题方法
4 . 已知椭圆
的左、右焦点分别为
,
,点
是椭圆
上的一点,延长
交椭圆
于点
,且
为等边三角形,则椭圆
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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.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/42f0a4d7fdf80e0a663cb21aeda3de21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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5 . 点
是椭圆
的左、右顶点,
是椭圆上不同于
的任意一点,若直线
的斜率之积为
,则椭圆
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fb7ec4aa413693f4ecae59fe0e2084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b889efe020137b112bfafaa8e0becda4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
6 . 已知椭圆
的左、右焦点分别是
,斜率为
的直线l经过点
且交
于
两点(点
在第一象限),若
的面积是
的面积的3倍,则
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cfd997d3b66a3b8f7731b26f0ab0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47444b5fbc4252516d54263062e47c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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7 . 高二年级某同学打篮球时,发现当篮球放在地面上时,篮球的斜上方灯泡照过来的光线使得篮球在地面上留下的影子有点像数学课堂上学过的椭圆.通过自学与老师探讨,他还确定地面和篮球的接触点(切点)就是影子椭圆的焦点,他在家里做了个探究实验:如图所示,当篮球放在桌面并被斜上方一个灯泡
(当成质点)发出的光线照射后,在桌面上留下的影子是椭圆,且篮球与桌面的接触点是椭圆的右焦点,若篮球的半径为1个单位长度,灯泡与桌面的距离为4个单位长度,灯泡垂直照射在平面上的点为
,椭圆的右顶点到
点的距离为3个单位长度,则此时椭圆的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/47ce2b47812fce4b17fd813d0e4cce21.png)
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解题方法
8 . 已知
是椭圆
的右焦点,点
在椭圆上,
,且
,则椭圆的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54363e4039d93ec0f67d011897a1f54d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a528a470ed0302853ec5cb0e3fbf854.png)
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解题方法
9 . 已知椭圆
:
(
)的左、右焦点分别为
,
,下顶点为
,直线
与椭圆
的另一个交点为
,若
为等腰三角形,则椭圆
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86dbcf83cd5d3421b3eed7be7dab32d.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/88012f614ee4f6d0edeed4e24bcca580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
10 . 已知椭圆
:
的左、右焦点分别为
和
,
是椭圆
上一点,线段
与
轴交于
,若
,
,则椭圆
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347b68f42934c74e0d759a67613a1da9.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7272356beb98a7953a49651324cb6455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f9761fdba86a37539fc21f70700fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001c9f4f1da46fa7582ceeb4f67cb15b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2024-04-03更新
|
369次组卷
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3卷引用:安徽省芜湖市第一中学2023届高三最后一卷数学试题