解题方法
1 . 已知椭圆
过点
,且焦距为
.
(1)求椭圆
的标准方程;
(2)过点
作两条互相垂直的弦
,设弦
的中点分别为
.证明:直线
必过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc3e47a358860345e74450ce2af9f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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2 . 已知椭圆
的焦距为6,圆
9与椭圆C有且仅有两个公共点
(1)求椭圆
的标准方程;
(2)已知动直线
过曲线
的左焦点F,且与椭圆
分别交于P,Q两点,试问x轴上是否存在定点R,使得
为定值?若存在,求出该定点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ac87fe673ce030e468921070f2c540.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知动直线
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0165dc138f86a9d818eb9a098b4a0d67.png)
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2024高三·全国·专题练习
解题方法
3 . 已知椭圆E:
的左顶点为A,设直线l交椭圆E于M、N两点,且以
为直径的圆恒过点A,求证:直线l恒过定点,并且求出此定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f4b244b3b0799cfb1994364036eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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名校
解题方法
4 . 平面内一动点P到直线
的距离,是它到定点
的距离的2倍.
(1)求动点P的轨迹
的方程;
(2)经过点F的直线(不与y轴重合)与轨迹
相交于M,N两点,过点M作y轴平行线交直线l于点T,求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fbf5b4a5543013296ff7e90ce24124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2347bec7975dab2b8bce2fd19b1237d0.png)
(1)求动点P的轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)经过点F的直线(不与y轴重合)与轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a8c60eb762b0951c61153fc17ba91b.png)
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2024-03-29更新
|
387次组卷
|
2卷引用:安徽省六安市2024届高三上学期期末教学质量检测数学试题
5 . 已知椭圆E:
过点
,且焦距为
.
(1)求椭圆E的标准方程;
(2)过点
作两条互相垂直的弦AB,CD,设弦AB,CD的中点分别为M,N.
①证明:直线MN必过定点;
②若弦AB,CD的斜率均存在,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求椭圆E的标准方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc3e47a358860345e74450ce2af9f9e.png)
①证明:直线MN必过定点;
②若弦AB,CD的斜率均存在,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb673705e1e596353a8dc38cc74a8a0e.png)
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2024-03-27更新
|
1834次组卷
|
5卷引用:河南省郑州市2024届高三第二次质量预测数学试题
名校
解题方法
6 . 已知椭圆
的左右顶点分别为A、B,点C在E上,点
分别为直线
上的点.
(1)求
的值;
(2)设直线
与椭圆E的另一个交点为D,求证:直线
经过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234cab13febe61a7d2237308672f70e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b2a723e48d8e02248e4fab1c5f818c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfb05e2ec0eb61fde5339fa2809ad7.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解题方法
7 . 如图,已知椭圆的左顶点为
,离心率为
是直线
上的两点,且
,其中
为坐标原点,直线
与
交于另外一点
,直线
与
交于另外一点
.
(1)记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d42cb68c5c877a455ba7ac0a6b6a651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42be0cf19dd95496f0ce52f72cd10f44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解题方法
8 . 已知椭圆
经过点
,下顶点
为抛物线
的焦点.
(1)求椭圆
的方程;
(2)若点
均在椭圆
上,且满足直线
与
的斜率之积为
,
(ⅰ)求证:直线
过定点;
(ⅱ)当
时,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cfeb2ed775551c13dba49b40005253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d213f131f206f5f3520860de56690.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2052732179abb51957769c28939b4358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f89eef3148f2d4d09379767b4af69132.png)
(ⅰ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4a8940130ef85d5c57abf7b1c0fe19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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2024-03-24更新
|
500次组卷
|
4卷引用:陕西省宝鸡市2024届高三下学期高考模拟检测(二)文科数学试题
9 . 已知
分别是椭圆
的左、右焦点,
分别为椭圆
的左右顶点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efbe4a54a27dc48e3f52d6249bd1681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877047626224b43b3f09f3bdbed0889b.png)
(1)求椭圆
的方程;
(2)若
为直线
上的一动点(点
不在
轴上),连接
交椭圆于
点,连接
并延长交椭圆于
点,试问是否存在
,便得
成立,若存在,求出
的值;若不存在,说明理由.
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efbe4a54a27dc48e3f52d6249bd1681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877047626224b43b3f09f3bdbed0889b.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495bb3e5a3a9d35f5c9f0cf1f5d51876.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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09d610afe0366d64f2f32a09da21f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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10 . 过椭圆的右焦点
作两条相互垂直的弦
,
,弦
,
的中点分别为
,
.
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb02e157819a2bdd0f2790cbc825e9.png)
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