如图,在平面直角坐标系
中,已知椭圆
的离心率为
,右准线
,过椭圆的右焦点F作
轴的垂线
,椭圆的切线
与直线
分别交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/59667693-8c1d-420b-904e-c27031ed6e9f.png?resizew=165)
(1)求椭圆的标准方程;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36732e8672233f301617f56e633e7166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495bb3e5a3a9d35f5c9f0cf1f5d51876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7e9d0e80d06d85627b9dca9e2aba1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaba77dcaf5c25fef9d6efa4037ec38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b620fda5b9d9cb945843ed433a5670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/59667693-8c1d-420b-904e-c27031ed6e9f.png?resizew=165)
(1)求椭圆的标准方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf557663f0be81c3e5f0e294b637031.png)
更新时间:2019-07-11 20:24:25
|
相似题推荐
解答题-问答题
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解题方法
【推荐1】已知椭圆
的焦点在
轴上,中心在原点,离心率
,直线
与以原点为圆心,椭圆
的短半轴为半径的圆
相切.
(1)求椭圆
的方程;
(2)设椭圆
的左、右顶点分别为
,点
是椭圆上异于
的任意一点,直线
的斜率分别为
.证明:
为定值.
![](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/dc0f38d3c8749ba5768226a0b23b247c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f61de965b9d38982e5a75af2737e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c40c78e929946729c8ccd4cadf5740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c13c6723ac32355fed35bbb2656180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b59133bc5714d89a8ebfbf5864db2.png)
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解题方法
【推荐2】已知椭圆
:
(
)的左、右两焦点分别为
,
,短轴的一个端点为
,直线
:
交椭圆
于
,
两点,
.
(1)若椭圆的离心率为
,求椭圆的方程;
(2)若点
到直线
的距离不小于
,求椭圆的离心率的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953b0e963195605a67975c6f8f3caa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/539215b65cb8112f4b3835c58a925022.png)
(1)若椭圆的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
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【推荐1】在平面直角坐标系xOy中,已知椭圆C1:
的左焦点为F1(-2,0),且点P(0,2)在椭圆C1上.
(1)求椭圆C1的方程;
(2)设直线l同时与椭圆C1和抛物线C2:y2=8x相切,求直线l的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
(1)求椭圆C1的方程;
(2)设直线l同时与椭圆C1和抛物线C2:y2=8x相切,求直线l的方程
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解题方法
【推荐2】在平面直角坐标系xOy中,直线l的参数方程为
(t为参数,a∈R).在以坐标原点为极点,x轴的非负半轴为极轴的极坐标系中,曲线C的极坐标方程为
.
(1)若点A(0,4)在直线l上,求直线l的极坐标方程;
(2)已知a>0,若点P在直线l上,点Q在曲线C上,若|PQ|最小值
为,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df33efdc4d4ab36ce76aa0dae82641d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897b95b4fa201f0e08bff76016cf2fd9.png)
(1)若点A(0,4)在直线l上,求直线l的极坐标方程;
(2)已知a>0,若点P在直线l上,点Q在曲线C上,若|PQ|最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
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