1 . 已知动点
分别在直线
与
上移动,则线段
的中点P到坐标原点O的距离可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de17abedc76f9f3b5b618cfddb8e76c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451deb2efdc39b42c9dda544d614d677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 过点P向圆
作切线,切点为A,过点P向圆
作切线,切点为B,若
,则动点P的轨迹方程为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eadd1aa35dae9dacfcfb065cdbb9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1543db15ad1e251db19233650426e538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81529452eb2cb8578fd164db9e957ae.png)
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名校
3 . 已知
,
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97df5ceec3ec2af6d75b71dee62c0027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51159984b2cb00f30b3986315019623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7322fe6711f9925bb68973f73941a101.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知圆O:
,过点M作圆O的两条切线,切点分别为A,B,且直线
恒过定点
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947bca78fd2d7a7436dd9dedbba3baa6.png)
A.点M的轨迹方程为![]() |
B.![]() ![]() |
C.圆O上的点到直线AB的距离的最大值为![]() |
D.![]() |
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2023-11-15更新
|
822次组卷
|
2卷引用:河南省湘豫名校联考2023-2024学年高二上学期10月阶段性考试数学试题
名校
解题方法
5 . 已知动点
到
轴的距离等于它到
轴的距离的2倍.
(1)求动点
的轨迹
的方程,并说明轨迹
是什么图形:
(2)直线
与曲线
交于
两点,且点
是线段
的中点,求直线
的方程:
(3)直线
与曲线
交于
两点,且
,求直线
的方程.
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)直线
![](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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9602114f45bdcb304e02710ae7bc0e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
6 . 数学家欧拉在1765年提出;三角形的外心,重心,垂心依次位于同一直线上,且重心到外心的距离是重心到垂心距离的一半,这条直线被后人称之为三角形的欧拉线.若
的顶点A(2,0),B(0,4),且
的欧拉线的方程为
,记
外接圆圆心记为M. 求:
(1)圆M的方程;
(2)已知圆N:
,过圆M和圆N外一点P分别作两圆的切线,与圆M切于点A,与圆N切于点B,且
,求P点的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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)
(1)圆M的方程;
(2)已知圆N:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb3a1aa8cf3ad77cff72b8929b50618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f30acc34f4ee1077532ae6808af2ab2.png)
您最近一年使用:0次
2023-02-05更新
|
323次组卷
|
2卷引用:河北省石家庄市2022-2023学年高二上学期11月期中数学试题
名校
解题方法
7 . 已知圆O:
上有且只有两个点到直线l:
的距离为1,则圆O半径r的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4896f254406ddfe0744b63f10724e76a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373623cbddedc5fc80cac3f19d49e2ac.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 已知圆O:x2+y2=1和定点T(2,1),由圆O外一动点P(m,n)向圆O引切线PQ,切点为Q,且满足|PQ|=|PT|.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/4755973d-078f-4d47-a0b3-6e1ce51cf3f1.png?resizew=149)
(1)求证:动点P在定直线上,求出定直线的一般式方程;
(2)求线段PQ长的最小值,并写出此时点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/4755973d-078f-4d47-a0b3-6e1ce51cf3f1.png?resizew=149)
(1)求证:动点P在定直线上,求出定直线的一般式方程;
(2)求线段PQ长的最小值,并写出此时点P的坐标.
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9 . 若动点
、
分别在直线
:
与
:
上移动,则AB的中点M到原点的距离可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230324e34d4bbee4991e9f314b0b2852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c12cc8f482e91fa7bd38bcdba359a521.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 若动点
、
分别在直线
与
上移动,则
的中点
到原点的距离可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17be71ff6deb81c73812889dace25b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ba68fa2054eff837e8a346aaf0d8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-11-12更新
|
193次组卷
|
2卷引用:河北省石家庄市十八中2022-2023学年高二上学期第一次月考数学试题