已知点
,
且AB为圆C的直径.
(1)求圆C的方程;
(2)设点P为圆C上的任意一点,过点P作倾斜角为
的直线
,且
与直线
相交于点M,求
的最大值及此时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50cff83623dacd2121d26cb6b9379696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797b61bf062aa019a2d758b89c9511bb.png)
(1)求圆C的方程;
(2)设点P为圆C上的任意一点,过点P作倾斜角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4f3ea707431e69ce7f67f20b09c5ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1e29bc2fd46f8905a3c230cf543c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
更新时间:2020-03-13 14:21:33
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解题方法
【推荐1】数学家欧拉在1765年提出:三角形的重心、外心、垂心位于同一直线上,这条直线被后人称之为三角形的欧拉线,若
的顶点
,
,且
的欧拉线的方程为
.(注:如果
三个顶点坐标分别为
,则
重心的坐标是
.)
(1)求
外心
(外接圆圆心)的坐标;
(2)求顶点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d429efe96d68065e7d433c996682791d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23fc11a3a7592c68b20f93bdde2ed3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35644a7d25d0410409238f52c8818083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1496d9b89f38dc7f5a13845535d41fe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】已知
中,直线
过
两点,点
在
轴上,且
为正三角形.
(1)求过
的直线方程;
(2)设过
两点的直线
斜率为
,过A,B两点的直线
斜率为
,且
,
,且圆
与
有且只有2个交点,求r的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dde0ce21d177039504e8e89c7cab93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)设过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a72f79d9e3f6a67c1545dfe88a5f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15fc80566442a54ddd883c7c53074b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95da79aaca8eb32cc1bf63a306384dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1dc007e36c78ab98df4cd2383b4c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad66eb36cc8670724b6b9d6425091165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419fb45a9ff77d0d420e194b4b91232f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734fafa3c7a6320e0fc936550357475f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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真题
解题方法
【推荐1】已知椭圆
的左焦点为F,O为坐标原点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/7b1b6ebb-f504-4f05-9453-de9d1df169ec.png?resizew=240)
(1)求过点O、F,并且与椭圆的左准线l相切的圆的方程;
(2)设过点F的直线交椭圆于A、B两点,并且线段
的中点在直线
上,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/7b1b6ebb-f504-4f05-9453-de9d1df169ec.png?resizew=240)
(1)求过点O、F,并且与椭圆的左准线l相切的圆的方程;
(2)设过点F的直线交椭圆于A、B两点,并且线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1a686b80b8f109a929f58c2de7201d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】拋物线C的顶点为坐标原点O,焦点在x轴上,直线l:
交C于P,Q两点,且
.已知点M的坐标为
,
与直线l相切.
(1)求抛物线C和
的标准方程;
(2)已知点
,点
,
是C上的两个点,且直线
,
均与
相切.判断直线
与
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
(1)求抛物线C和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d49681a83aa1cb850b237222749227a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443a82723ae5cf11aa917362e7db003f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a439c8a01a6626d7a3f53af31ef0bcae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
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【推荐1】在平面直角坐标系
中曲线
与坐标轴的交点都在圆
上,已知点
,
,点
是圆
上的动点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580fd0922555f194b42229bc09686fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993769b494e12c21dff0ee7c53a4a49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3c9cc823b331f0c211c1541d9bdb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
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【推荐2】在平面直角坐标系
中有曲线
.如图,点
为曲线
上的动点,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/dd3baa95-dbea-4317-bea4-af15f6b0462e.png?resizew=169)
(1)求线段
的中点的轨迹方程;
(2)求三角形
的面积最大值,并求出对应
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03389999e6c9bccf53e6c3703c70a581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/dd3baa95-dbea-4317-bea4-af15f6b0462e.png?resizew=169)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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