名校
解题方法
1 . 已知点
为椭圆
上任意一点,直线
与圆
交于
,
两点,点
为椭圆
的左焦点.
(1)求证:直线
与椭圆
相切;
(2)判断
是否为定值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3511cdc6a9b56bc1d9415d3d94ef0f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533b93dd6eb6b474481247736699c76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482aa1008b1009aa649b2e44a5d05a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0eea02b3e07ba8b9771e9401a81f983.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36719f1e764ee0e719b65c49fae84677.png)
您最近一年使用:0次
2020-04-22更新
|
459次组卷
|
3卷引用:陕西省西安市西北工业大学附属中学2020-2021学年高三下学期4月月考理科数学试题
解题方法
2 . 已知椭圆
的离心率为
,右焦点为
,以原点
为圆心,椭圆
的短半轴长为半径的圆与直线
相切.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/6d816f59-2b16-4298-9b55-3d5ca28d5bd2.png?resizew=237)
(1)求椭圆
的方程;
(2)如图,过定点
的直线
交椭圆
于不同的两点
,连接
并延长交椭圆
于点
,设直线
的斜率分别为
,求证:
为定值.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7ca47ea8b78dd4c0389eee8620d523.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/6d816f59-2b16-4298-9b55-3d5ca28d5bd2.png?resizew=237)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7471451108cf5d0fbb66e8819759a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
您最近一年使用:0次
名校
3 . 已知离心率为
的椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0fe9059acc47d2447576e1260c4622.png)
的左顶点为A,且椭圆E经过
与坐标轴不垂直的直线l与椭圆E交于C,D两点,且直线AC和直线AD的斜率之积为
.
(I)求椭圆E的标准方程;
(Ⅱ)求证:直线l过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0fe9059acc47d2447576e1260c4622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480f004c98a0df86a35a48bc973f0472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1a28d07fb1904c65774987073d6f9d.png)
(I)求椭圆E的标准方程;
(Ⅱ)求证:直线l过定点.
您最近一年使用:0次
2020-01-29更新
|
430次组卷
|
4卷引用:陕西省西安市庆华中学2020-2021学年高三上学期第二次月考文科数学试题
名校
解题方法
4 . 在平面直角坐标系
中,已知椭圆
的焦距为2,离心率为
,椭圆的右顶点为
.
(2)过点
作直线
交椭圆于两个不同点
,
,求证:直线
,
的斜率之和为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcba5c93bd4035937949aafa0c354106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
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2020-09-06更新
|
2295次组卷
|
12卷引用:陕西省渭南市大荔县2020-2021学年高二上学期期末数学(理)试题
陕西省渭南市大荔县2020-2021学年高二上学期期末数学(理)试题2016-2017学年江苏苏锡常镇四市高三教学情况调研(一)数学试卷【全国市级联考】新疆维吾尔自治区乌鲁木齐地区2018届高三5月适应性训练数学(理)试题【全国市级联考】新疆乌鲁木齐地区2018届高三5月适应性训练数学文试题【全国百强校】江西省抚州市金溪县第一中学2018-2019学年高二12月月考数学(文)试题【全国百强校】江西省南昌市第十中学2018-2019学年高二上学期第二次月考数学(文)试题宁夏石嘴山市第三中学2019-2020学年高三第四次高考适应性考试数学(理)试题2020届重庆市北碚区高三上学期第一次诊断性考试数学试题2020届江苏省南通市如东县栟茶高级中学高三上学期第三次月考数学试题人教A版(2019) 选择性必修第一册 第三章 圆锥曲线的方程 单元测试广东省佛山市禅城区佛山第一中学2022届高三上学期10月月考数学试题河南省济源市第四中学2023-2024学年高二上学期12月考数学试卷
名校
解题方法
5 . 已知椭圆
,过坐标原点的直线交椭圆于
、
两点,其中
在第一象限,过
作
轴的垂线,垂足为
,连接
,并延长交椭圆于点
,设直线
的斜率为
.
(1)当
时,求点
到直线
的距离
;
(2)对任意
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
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名校
解题方法
6 . 已知椭圆C:
的离心率为
,长轴长为
.
Ⅰ
求椭圆C的方程;
Ⅱ
斜率为1的直线l过椭圆C的右焦点F,交椭圆C于A,B两点,设M为椭圆C上任意一点,且
,其中O为原点
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc860cece09bffcc2593dc7b11aee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb57575dea540c569265de158429425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd72b6a249a09c977c55226031195466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbb391bcb279073a82e886896e47eea.png)
您最近一年使用:0次
2019-03-08更新
|
1407次组卷
|
3卷引用:陕西省宝鸡市宝鸡中学2019-2020学年高三上学期期中数学(理)试题
名校
7 . 已知点
在椭圆
:
上,
为坐标原点,直线
:
的斜率与直线
的斜率乘积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)求椭圆
的方程;
(2)不经过点
的直线
:
(
且
)与椭圆
交于
,
两点,
关于原点的对称点为
(与点
不重合),直线
,
与
轴分别交于两点
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbb03c99a2d5c3dd812a8af41e696907.png)
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f1dca2fccd63feb7a8cae3d9285ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)不经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54205fa265afe49efea30766f4b2fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6da2235c42867f9a79007c3fc83fec9.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/f2765917637583d22a579ff075f9baa3.png)
您最近一年使用:0次
2019-01-08更新
|
2290次组卷
|
11卷引用:陕西省宝鸡市金台区2019-2020学年高三教学质量检测数学理试题
陕西省宝鸡市金台区2019-2020学年高三教学质量检测数学理试题陕西省宝鸡市金台区2019-2020学年高三教学质量检测数学文试题【市级联考】福建省福州市2019届高三第一学期质量抽测数学(理科)试题【全国百强校】宁夏银川一中2019届高三第一次模拟考试数学(理)试题宁夏银川一中2019届高三年级第二次模拟考试理科数学试题(已下线)专题07 解析几何中的证明问题(第五篇)-备战2020年高考数学大题精做之解答题题型全覆盖(已下线)专题41 定比点差法、齐次化、极点极线问题、蝴蝶问题2.4直线与圆锥曲线的位置关系(习题)-2021-2022学年高二上学期数学北师大版(2019)选择性必修第一册(已下线)第五篇 向量与几何 专题11 圆锥曲线中的蝴蝶定理 微点2 圆锥曲线中的坎迪定理福建省莆田市华侨中学2022-2023学年高二上学期期末质量监测数学试题(已下线)重难点突破18 定比点差法、齐次化、极点极线问题、蝴蝶问题(四大题型)
名校
8 . 已知A(-2,0),B(2,0)为椭圆C的左、右顶点,F为其右焦点,P是椭圆C上异于A,B的动点,且△APB面积的最大值为
.
(Ⅰ)求椭圆C的方程;
(Ⅱ)直线AP与椭圆在点B处的切线交于点D,当点P在椭圆上运动时,求证:以BD为直径的圆与直线PF恒相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(Ⅰ)求椭圆C的方程;
(Ⅱ)直线AP与椭圆在点B处的切线交于点D,当点P在椭圆上运动时,求证:以BD为直径的圆与直线PF恒相切.
您最近一年使用:0次
2018-08-06更新
|
843次组卷
|
5卷引用:2018年陕西省高三教学质量检测试题 理科数学(二)试题
名校
9 . 已知
点
是动点,且直线
和直线
的斜率之积为
.
(1)求动点
的轨迹方程;
(2)设直线
与(1)中轨迹相切于点
,与直线
相交于点
且
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be1db41ab368d578ddec3a69bf48724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78fd95f89dec2d373fa57f02acd739f.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58e812c6efc3ecba8ce709dce8175f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb29873e4310e89421eed3346e1c053f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1859194c10af8bc005f13a4c019de8db.png)
您最近一年使用:0次
10 . 在直角坐标系
中,点P到两点
,
的距离之和等于4,设点P的轨迹为
,直线
与C交于A,B两点.
(Ⅰ)写出C的方程;
(Ⅱ)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bf8324a9ea8db1a257714ff8afc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
,求k的值;
(Ⅲ)若点A在第一象限,证明:当k>0时,恒有|
|>|
|.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661cf362cc4a3938abce5882beb79d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f65b98face3c3c5dee0bd7975fe264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
(Ⅰ)写出C的方程;
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bf8324a9ea8db1a257714ff8afc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3448a1728b998469d1fcaef320d68a.png)
(Ⅲ)若点A在第一象限,证明:当k>0时,恒有|
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bf8324a9ea8db1a257714ff8afc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3448a1728b998469d1fcaef320d68a.png)
您最近一年使用:0次
2019-01-30更新
|
2035次组卷
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10卷引用:陕西省商洛市商丹高新学校2019-2020学年高二上学期11月质量检测数学(理)试题
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