已知椭圆
(
)离心率等于
,且椭圆C经过点
.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893673220882432/2897894778650624/STEM/24cd3213-8659-4065-abb9-5c129c88a0a2.png?resizew=191)
(1)求椭圆C的方程;
(2)过点P作倾斜角分别为
的两条直线PA,PB,设PA,PB与椭圆C异于点P的交点分别为A,B,若
,试问直线AB的斜率是否为定值?如果为定值,请求出此定值;如果不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ee7b4295762f84fe30a066e9fe7a6b.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893673220882432/2897894778650624/STEM/24cd3213-8659-4065-abb9-5c129c88a0a2.png?resizew=191)
(1)求椭圆C的方程;
(2)过点P作倾斜角分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8facc3fc2ee2715d4ba7e41958859d55.png)
更新时间:2022-01-19 16:44:55
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【推荐1】已知椭圆
过点
,且
,若直线
与椭圆C交于M,N两点,过点M作x轴的垂线分别与直线
交于点A,B,其中O为原点.
(1)求椭圆C的方程;
(2)若
,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480f004c98a0df86a35a48bc973f0472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8242f3a6a00149f6211bfce2dfc5c4ca.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777ee073cf1a91572b50c3fafb2c0ed.png)
(1)求椭圆C的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41241f149633b808cfbda1374ced2ff1.png)
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【推荐2】已知椭圆
:
的一个焦点为
,点
在
上.
(1)求椭圆
的方程;
(2)若直线
:
与椭圆
相交于
,
两点,问
轴上是否存在点
,使得
是以
为直角顶点的等腰直角三角形?若存在,求点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278b99933923773091940d566d36277c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4201d3bead2e48cc80052b1418f23db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】已知椭圆
的焦距为2,一个顶点为A(0,2).
(1)求椭圆E的标准方程及离心率;
(2)过点P(0,3)的直线l斜率为k,交椭圆E于不同的两点B、C,直线AB、AC分别交直线
于点M、N.求|
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037a4c9296fb9427f0b05765ae5daa51.png)
(1)求椭圆E的标准方程及离心率;
(2)过点P(0,3)的直线l斜率为k,交椭圆E于不同的两点B、C,直线AB、AC分别交直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9355031ea0b2dc9cef3777621bc6d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833e60f1b03260c8af79f981ca25c216.png)
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【推荐2】如图,椭圆
的左、右焦点分别为
过
的直线交椭圆于
两点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9791f9921b0e33237809e8839992a8eb.png)
,求椭圆的标准方程
(2)若
求椭圆的离心率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf56a7eb7cf44143f7275ad8f61be1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9791f9921b0e33237809e8839992a8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c16e942a2cc5e46910c9162719bd9ee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fcb0dee66e1551c2cb8c9d8619ad5aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dac40bf7acf1a118328b0560182a6ef.png)
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【推荐1】已知A(-2,0),B(2,0)分别是椭圆
的左、右顶点,F是椭圆的右焦点,点Q(
,
)在椭圆上,P是椭圆上异于A,B的一点.
(1)求椭圆C的标准方程:
(2)设直线l的方程为
,若直线AP与直线l交于点M,直线BP与直线l交于点N,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆C的标准方程:
(2)设直线l的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301edd55529e0c54f93411fd606fd5a1.png)
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【推荐2】已知椭圆
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/6bb15aae-0dac-40f9-8d41-2ad609a9e958.png?resizew=252)
(1)求直线
被椭圆截得的线段长(用
表示);
(2)如图,过定点
的直线
交椭圆
于
两点,直线
,
的斜率分别为
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533b93dd6eb6b474481247736699c76c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/6bb15aae-0dac-40f9-8d41-2ad609a9e958.png?resizew=252)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)如图,过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bacfc149ede71417fa599c21b5a84cb8.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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【推荐1】已知椭圆
过点
,且离心率
.
(1)求椭圆E的方程;
(2)若直线
与椭圆E相交于M,N两点,与y轴相交于点
,且满足
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a729f65506a266d731b6c8646ea6e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
(1)求椭圆E的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd2d7156d9e4cd83b605c922b63856e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b375f4176d92100b2fba054aec1f9f0d.png)
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【推荐2】已知
为椭圆
的左、右焦点,点
为其上一点,且
.
(1)求椭圆
的标准方程;
(2)已知直线
与椭圆
相交于
两点,与
轴交于点
,若存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea8a480a2fe03293cb8303da8837d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f595683f69d5d6b5ca76408b0ff6ff17.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e2bb5ee9f66bfabd8489857e9360f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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