名校
1 . 已知圆
经过点
,且与直线
相切,圆心
在直线
上.
(1)求圆
的方程;
(2)点
在直线
上,过
点作圆
的两条切线,分别与圆切于
、
两点,求四边形
周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fadc9a19de13ca7688ca93f0c70a8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4407788e4dc88210bca71a2551d4f2f9.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eed461026f69fe9ab2c5dc12af8ac7.png)
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3029ea5516e56e8d20594c71929624f.png)
您最近一年使用:0次
2020-01-03更新
|
313次组卷
|
2卷引用:江苏省淮安市淮阴中学2019-2020学年高二上学期期中数学试题
2 . 已知曲线
与x轴交于
,
两点,点
的坐标为
.圆
过
三点,当实数
变化时,存在一条定直线
被圆
截得的弦长为定值,则此直线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee7af19bc3cf8457d7095152ed8e373.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 在平面直角坐标系
中,曲线
与坐标轴的交点都在圆
上.
(1)求圆
的方程;
(2)圆
上有两点
、
关于直线
:
对称,求过点
与直线
平行的直线
被圆
截得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d794141572c8b1e70957754f32b9eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)圆
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1111fea5c47ce1fdfc9ec28ac370955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be3ad3dd6803d92df6ff8a80cd35095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354f8e9d6cca157b95877d6540d16fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
4 . 圆
的半径为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa42baf2d4786dee626d8d6ea310e069.png)
您最近一年使用:0次
2017-08-15更新
|
599次组卷
|
2卷引用:安徽省合肥市2018届高三调研性检测数学文试题
5 . 已知命题
:“关于
,
的方程
表示圆(
)”,命题
:“
,使得
(
)”.
(1)若命题
为真命题,求实数
的取值范围;
(2)若命题
为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe08341572b2ce6d39d994af71c01967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f231c541c0ec4e70f14195d270610c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
13-14高一下·黑龙江·期末
6 . 直线
与曲线
有公共点,则
的取值范围是_________ .
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571823958302720/1571823963873280/STEM/aea9ad53001d4a08ab86f6a3e4a5e482.png?resizew=57)
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571823958302720/1571823963873280/STEM/26128674a6a1490c8cee509206b66f27.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571823958302720/1571823963873280/STEM/08bdd93dd648401cb409a5caa096ae46.png?resizew=13)
您最近一年使用:0次
2016-12-04更新
|
263次组卷
|
3卷引用:2015-2016学年江苏省淮安市田家炳中学高二下期中理科数学试卷
11-12高二上·江苏淮安·期末
解题方法
7 . 如图,抛物线
与
轴交于O,A两点,交直线
于O,B两点,经过三点O,A,B作圆C
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/f2e6b0ef-574d-42aa-932d-9eb726fe233e.png?resizew=137)
(1)求证:当b变化时,圆C的圆心在一条定直线上;
(2)求证:圆C经过除原点外的一个定点;
(3)是否存在这样的抛物线M,使它的顶点与C的距离不大于圆C的半径?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533060d33d8d7f5c93e3b2729aff688e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c037b199f33cbed1efcffdd2376d8c10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/f2e6b0ef-574d-42aa-932d-9eb726fe233e.png?resizew=137)
(1)求证:当b变化时,圆C的圆心在一条定直线上;
(2)求证:圆C经过除原点外的一个定点;
(3)是否存在这样的抛物线M,使它的顶点与C的距离不大于圆C的半径?
您最近一年使用:0次