已知椭圆
,点
与点
在椭圆
上.已知
,
为坐标原点,且
.
(1)求椭圆
的方程;
(2)已知
,若
是椭圆
上一动点,求
的最大值,并写出此时
点坐标 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32366143230ca122894a4bada7c7b96d.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/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac88c8bddce2dce6b2eb1b09f1ccedf.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837f2ba6ad693807bb817c872d7286aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71684a46ec1ba25ba0b5a530995310f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
更新时间:2020-03-13 09:30:26
|
相似题推荐
【推荐1】已知椭圆
的两个焦点为
,离心率为
,直线
与椭圆相交于
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,
,
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(1)求椭圆的方程;
(2)证明:
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(1)求椭圆的方程;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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【推荐2】已知椭圆
:
的焦距为4,且点
在椭圆
上,直线
经过椭圆
的左焦点
,与椭圆
交于
两点,且其斜率为
,
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为椭圆
的右焦点.
(1)求椭圆
的方程;
(2)设
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交于
两点,直线
的斜率为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f5076289823db419f94e9c0c8f4aafd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fe66363e4aac9224c34ca788331c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec56d586906ebaaa3c32c85a415f4c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
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解题方法
【推荐1】如图,椭圆C:
(a>b>0),圆O:x2+y2=b2,过椭圆C的上顶点A的直线l:y=kx+b分别交圆O、椭圆C于不同的两点P,Q,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/18dfd318-b8c4-4a88-af6b-640e6bca4fa0.png?resizew=170)
(1)若点P(-3,0),点Q(-4,-1),求椭圆C的方程;
(2)若λ=3,求椭圆C的离心率e的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bdec367150e16ec79be4622f35e83e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/18dfd318-b8c4-4a88-af6b-640e6bca4fa0.png?resizew=170)
(1)若点P(-3,0),点Q(-4,-1),求椭圆C的方程;
(2)若λ=3,求椭圆C的离心率e的取值范围.
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名校
解题方法
【推荐2】已知椭圆
与直线
有且只有一个交点,点
为椭圆
上任一点,
,
,若
的最小值为
.
(1)求椭圆
的标准方程;
(2)设直线
与椭圆
交于不同两点
,点
为坐标原点,且
,当
的面积
最大时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd993d0d4a7948df0cecb45b02b0242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640a608518f7cffb5454249f4f915e34.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576833b76e9cad3b523f87132308df99.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/2fc5bd66dd6d5e09ff0893a938aed56e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbff8fa99fb13b18270b6fde0cb737c5.png)
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