在平面直角坐标系xOy中,已知椭圆C1:
与椭圆C2:
,且椭圆C2过椭圆C1的焦点,过点
的直线l与椭圆C1交于A,B两点,与椭圆C2交于C,D两点.
(1)求椭圆C1的标准方程;
(2)若存在直线l,使得
,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77bb900f8c975bf487cd57319d488938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f642cc82f9cb94f68265b4ec78f8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72e75d7489b29f907ce4454889cd3e4.png)
(1)求椭圆C1的标准方程;
(2)若存在直线l,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3881dc7364396fde203ba905ea72fbf6.png)
2023·陕西西安·模拟预测 查看更多[5]
陕西省西安中学2023届高三七模理科数学试题(已下线)模块九 第6套 1单选 2多选 2填空 2解答题(解析几何 导数)(已下线)专题14圆锥曲线中的最值、范围、探索问题(已下线)广东省广州市中山大学附属中学2024届高三上学期期中数学试题变式题19-22(已下线)专题15 圆锥曲线综合
更新时间:2023-04-29 14:23:08
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【推荐1】已知椭圆
的离心率为
,左右焦点分别为
为椭圆上一点,
与
轴交于点
,
(1)求椭圆
的方程;
(2)设直线
与椭圆
相交于
两点,过
作与
轴垂直的直线
,试问
轴上是否存在定点
,使得直线
与直线
交点的横坐标为定值?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/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c893bc5081ac0a24d4b112982d26d793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6b8eda1b78c8b060c4192455fd2480.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d598fb92a8dc71b7e8e0fd26c935cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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【推荐2】已知椭圆C:
过点A(﹣1,
),B(
),F为椭圆C的左焦点.
(Ⅰ)求椭圆C的标准方程;
(Ⅱ)若点M为直线l1:x+y+2=0与直线l2:2x﹣y+4=0的交点,过点M的直线1与椭圆C交于D,E两点,求△DEF面积的最大值,以及此时直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8861471ffdc659106aa5e06cb906eeb1.png)
(Ⅰ)求椭圆C的标准方程;
(Ⅱ)若点M为直线l1:x+y+2=0与直线l2:2x﹣y+4=0的交点,过点M的直线1与椭圆C交于D,E两点,求△DEF面积的最大值,以及此时直线l的方程.
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【推荐1】已知
,
分别是椭圆
的左右顶点,
为坐标原点,
,点
在椭圆
上.过点
,且与坐标轴不垂直的直线
交椭圆
于
、
两个不同的点.
(1)求椭圆
的标准方程;
(2)当直线
的倾斜角
为锐角时,设直线
,
分别交
轴于点
、
,记
,
,求
的取值范围.
![](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/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c6d5e10b0164e59c49d56d157be9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500272f9f312e2bc0f32e4afc058db41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bab45799f9f8d0374f529e8b30a0b27.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/accc443b1900c02b55e0f991ce35fbf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23df39598e5f9baef2b7d41fffc31afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
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【推荐2】经过圆
上一动点
作椭圆
的两条切线,切点分别记为
,直线
分别与圆
相交于异于点
的
两点.
(1)求证:
.
(2)求
的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f62686f6f9118291c444a8d5a4d0f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4402aeb853b22f20992156957ef0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d4a832771ba45d407f31000c8fcf37.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/e6670479a0083dd2dfd5ad55b47b1ab6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47edebfb2fb3323fc5445098e0aaaf12.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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