已知椭圆
的右焦点为F,过F作一条直线交C于R,S两点,线段RS长度的最小值为3,C的离心率为
.
(1)求C的方程;
(2)不过C的左顶点A的直线l与C相交于P,Q两点,且直线AP与AQ的斜率之积恰好等于
.试问直线l是否过定点?若过定点,求出该定点的坐标;若不过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求C的方程;
(2)不过C的左顶点A的直线l与C相交于P,Q两点,且直线AP与AQ的斜率之积恰好等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
更新时间:2023-01-16 14:42:03
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【推荐1】如图所示,在平面直角坐标系
中,已知椭圆
的离心率为
,短轴长为
.
![](https://img.xkw.com/dksih/QBM/2018/5/24/1952031181815808/1956440038080512/STEM/97e8b01521014b9791acff4aa325d4f9.png?resizew=239)
(1)求椭圆
的标准方程;
(2)设
为椭圆
的左顶点,
为椭圆
上位于
轴上方的点,直线
交
轴于点
,点
在
轴上,且
,设直线
交椭圆
于另一点
,求
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72e21f7a971790684e58a295dfb904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63348e973b45db1a742f3ec12b3ca81b.png)
![](https://img.xkw.com/dksih/QBM/2018/5/24/1952031181815808/1956440038080512/STEM/97e8b01521014b9791acff4aa325d4f9.png?resizew=239)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3ba6cb822cf38cf62ec5cbc105cfd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】在平面直角坐标系
中,椭圆
:
的右焦点为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a36aeca2ba23ce5bc2dab928158e62.png)
(
,
为常数),离心率等于0.8,过焦点
、倾斜角为
的直线
交椭圆
于
、
两点.
⑴求椭圆
的标准方程;
⑵若
时,
,求实数
;
⑶试问
的值是否与
的大小无关,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4c9d22ff6c1bb58c4313a40018d612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a36aeca2ba23ce5bc2dab928158e62.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ee36f4cdcef902aa4fa3905cb35dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.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)
⑴求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
⑵若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbc6c821f7ab0bfc267a6c5061996f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386406e5437aac324d647f51b8b2e5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
⑶试问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d92c510c7a614077d2c1cf5f6ce190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://img.xkw.com/dksih/QBM/2011/2/10/1569982764883968/1569982770143232/STEM/f1b1d47c672c4b64bdb8a265db2d5cf1.png)
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【推荐1】已知椭圆
,其中
是与
无关的实数.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/d8988e1a-de32-4e66-8215-41e7db4a1c23.png?resizew=106)
(1)求实数
的取值范围;
(2)当
时,如图所示,过点
的直线与椭圆
分别相交于点
,过点
且斜率为
的直线与椭圆
相交于点
,试探究直线
是否恒过定点?若是,求出这个定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58dc138c1290cdf0528630e18c7896d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/d8988e1a-de32-4e66-8215-41e7db4a1c23.png?resizew=106)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b73cbe595a76418351f6675a8cb32c.png)
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![](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/b74eb8a7738402df52d4a97262b85ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】已知圆
,点Q是圆M上的一个动点,点
.若线段
的垂直平分线交线段
于点T.
(1)求动点T的轨迹曲线C的方程;
(2)设O是坐标原点,点
,点R(异于原点)是曲线C内部且位于y轴上的一个动点,点S与点R关于原点对称,直线
分别与曲线C交于A,B(异于点P)两点.判断直线
是否过定点?若过,求出定点坐标;若不过,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e232b42840f7b68fe0f0b136a5ed8a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec0af111f015c3abe17b49a6f552969.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
(1)求动点T的轨迹曲线C的方程;
(2)设O是坐标原点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4754fbe523ca63eba3810a3f88f37df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ab899db6be54af9bf9cd141bae7a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】在椭圆:
(
)中,其所有外切矩形的顶点在一个定圆
:
上,称此圆为椭圆的蒙日圆.椭圆
过
,
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过椭圆
![](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/80065003fe6677e9a6b4f0dfb9d1db0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4f28029c21c82a381a782e4b16fcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c240a5e281eb282e3d596a446c9544.png)
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【推荐2】已知椭圆C:
的离心率为
,左顶点为
,左焦点为
,上顶点为
,下顶点为
,M为C上一动点,
面积的最大值为
.
(1)求椭圆C的方程;
(2)过
的直线l交椭圆C于D,E两点(异于点
,
),直线
,
相交于点Q,证明:点Q在一条平行于x轴的直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7955dc86d8afc10eac4b71c456c72a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34e01955f8c8fe2f0041b35d8d602a7.png)
(1)求椭圆C的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c10f14aae6fb21e047ecb39cdf40c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1158eaa2e338f564eb18de5bef1d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e1bca493e452800f697c5c640b4aa3.png)
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