名校
解题方法
1 . 已知椭圆
的中心为
,离心率为
.圆
在
的内部,半径为
.
,
分别为
和圆
上的动点,且
,
两点的最小距离为
.
(1)建立适当的坐标系,求
的方程;
(2)
,
是
上不同的两点,且直线
与以
为直径的圆的一个交点在圆
上.求证:以
为直径的圆过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.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/1174142f3bba761585b6bc2653009b36.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/0b80f580d0f5279d4a8fc07efdd9ca2e.png)
(1)建立适当的坐标系,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2022-04-03更新
|
1524次组卷
|
4卷引用:福建省2022届高三诊断性检测数学试题
福建省2022届高三诊断性检测数学试题(已下线)临考押题卷06-2022年高考数学临考押题卷(新高考卷)(已下线)必刷卷01-2022年高考数学考前信息必刷卷(新高考地区专用)福建省晋江市季延中学2022-2023学年高二上学期期中考试数学试题
名校
解题方法
2 . 已知经过圆
上点
的切线方程是
.
(1)类比上述性质,直接写出经过椭圆
上一点
的切线方程;
(2)已知椭圆
,P为直线
上的动点,过P作椭圆E的两条切线,切点分别为A、B,
①求证:直线AB过定点.
②当点P到直线AB的距离为
时,求三角形PAB的外接圆方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555b3f0f1fa800a03de11718a666bdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275bb66b8b128d42a53ab1b3dca79b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d340bd3f078b9261238d4fe59f1473c1.png)
(1)类比上述性质,直接写出经过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492b9f34846f339fd81c25dbf90282e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275bb66b8b128d42a53ab1b3dca79b62.png)
(2)已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5960f81307670e21234fff6229824af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
①求证:直线AB过定点.
②当点P到直线AB的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448f5c45be5e4ee2e189204d334b83fd.png)
您最近一年使用:0次
2020-07-02更新
|
647次组卷
|
5卷引用:福建省福州第一中学2020届高三6月高考模拟考试数学(文)试题
福建省福州第一中学2020届高三6月高考模拟考试数学(文)试题福建省2020届高三考前冲刺适应性模拟卷(三)数学(文)试题(已下线)专题36 切线与切点弦问题(已下线)专题24 圆锥曲线八类压轴题(解答题)-3(已下线)第08讲 2.4.2圆的一般方程(10 类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)
解题方法
3 . 已知圆
过点
,且圆心在
轴上.
(1)求圆
的方程.
(2)证明:过点
任意作两条倾斜角互补的直线,分别交圆
于
两点(
不重合),则直线
的斜率为定值,且定值为0.
(3)经研究发现将(2)中的点
改为点
,其余条件不变,直线
的斜率也为定值,且定值为
,若点
为圆
上任意一点,请给出类似于(2)的正确命题(不必证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d27f5218da7c76b4dce3e4acc18a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)证明:过点
![](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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)经研究发现将(2)中的点
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e8595e1ededa32dd780bf305b8c552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
真题
解题方法
4 . 如图,等边三角形OAB的边长为
,且其三个顶点均在抛物线E:x2=2py(p>0)上.
![](https://img.xkw.com/dksih/QBM/2012/7/5/1570915814023168/1570915819536384/STEM/5e02dae65cb84c5292897c2e2edea14a.png?resizew=154)
(1) 求抛物线E的方程;
(2) 设动直线l与抛物线E相切于点P,与直线y=-1相交于点Q.证明以PQ为直径的圆恒过y轴上某定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6093eebca8f3ff82ce9298feb197e955.png)
![](https://img.xkw.com/dksih/QBM/2012/7/5/1570915814023168/1570915819536384/STEM/5e02dae65cb84c5292897c2e2edea14a.png?resizew=154)
(1) 求抛物线E的方程;
(2) 设动直线l与抛物线E相切于点P,与直线y=-1相交于点Q.证明以PQ为直径的圆恒过y轴上某定点
您最近一年使用:0次
2019-01-30更新
|
2527次组卷
|
7卷引用:2012年全国普通高等学校招生统一考试文科数学(福建卷)
2012年全国普通高等学校招生统一考试文科数学(福建卷)(已下线)2013届新课标高三配套第四次月考文科数学试卷(已下线)2015高考数学(理)一轮配套特训:8-7抛物线(已下线)重难点08 直线与圆锥曲线(定点定值最值问题)-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)第44讲 解析几何中的极点极线问题-2022年新高考数学二轮专题突破精练广东省深圳市高级中学2017-2018学年高二上学期期中考试数学(文)试题江西省上饶市横峰中学2019-2020学年高二下学期开学考试数学(理)试题
名校
解题方法
5 . 如图,在平面直角坐标系
中,离心率为
的椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的左顶点为
,过原点
的直线(与坐标轴不重合)与椭圆
交于
两点,直线
分别与
轴交于
两点.若直线
斜率为
时,
.
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572055058956288/1572055065116672/STEM/d7f7d7c87d8e4053a956d1b46bf049d6.png)
(1)求椭圆
的标准方程;
(2)试问以
为直径的圆是否经过定点(与直线
的斜率无关)?请证明你的结论.
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572055058956288/1572055065116672/STEM/e36d417511b248bba30c49ee6faa620c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9bd788d2944327dd8d25047a08eea54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355c8e295cd0e7895a7bcabb31ebcf13.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572055058956288/1572055065116672/STEM/d7f7d7c87d8e4053a956d1b46bf049d6.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)试问以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2016-12-03更新
|
1213次组卷
|
7卷引用:2015届福建省龙岩市一中高三下学期考前模拟文科数学试卷