名校
1 . 在平面直角坐标系
中,设圆
的圆心为
.
(1)求过点
且与圆
相切的直线的方程;
(2)若过点
且斜率为
的直线与圆
相交于不同的两点
,
,以
、
为邻边做
,问是否存在常数
,使得
为矩形?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f143ca890a2e92f28a942cbad62781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cebd69bed2a31de09aec038ff302d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cebd69bed2a31de09aec038ff302d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9753ecb74f6f69afed0075042909c2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9753ecb74f6f69afed0075042909c2e5.png)
您最近一年使用:0次
2017-07-02更新
|
1032次组卷
|
6卷引用:内蒙古赤峰二中2018届高三上学期第二次月考数学(理)试题
名校
2 . 已知圆
.
(1)求过点
的圆的切线方程;
(2)若直线
过点
且被圆C截得的弦长为
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11583d5a9d06b238a94e3f24c8aa41b.png)
(1)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407417c2fd059a0cbb54f27edb8876bd.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d32e4f09e37cc2ce87d6694a1666960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2019-12-30更新
|
264次组卷
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3卷引用:内蒙古通辽市开鲁县第一中学2020-2021学年高二上学期第一次月考数学(文)试题
12-13高一·福建泉州·假期作业
名校
3 . 已知圆
和直线
,直线
,
都经过圆
外定点
.
(1)若直线
与圆
相切,求直线
的方程;
(2)若直线
与圆
相交于
两点,与
交于
点,且线段
的中点为
,
求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8365d7c7c74eed93f5b9461ce31870f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045cf6c42c53f44921c55a01fc4cdd8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdc7bdc6448ef9a13c59fdce1b9bb57.png)
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2017-11-04更新
|
1158次组卷
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3卷引用:内蒙古巴彦淖尔市第一中学2017-2018学年高二9月月考数学试题
名校
4 . 已知圆C:
,P点的坐标为(2,-1),过点P作圆C的切线,切点为A,B.
(1)求直线PA ,PB的方程;
(2)求过P点的圆的切线长即PA ,PB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b169005a471f6a39d3fa22dd7353fc66.png)
(1)求直线PA ,PB的方程;
(2)求过P点的圆的切线长即PA ,PB的长.
您最近一年使用:0次
2018-12-07更新
|
266次组卷
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2卷引用:【全国百强校】内蒙古巴彦淖尔一中2018-2019学年高二上学期10月月考数学(理)试题
名校
解题方法
5 . 已知平面直角坐标系内三点
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f3cd3027a533dd07220f161c958602.png)
(1)求过
,
,
三点的圆的方程,并指出圆心坐标与圆的半径;
(2)求过点
与条件(1)的圆相切的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1a9821a00b71f6b7d7a76d91b3f810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26e951d6d2369e8da79a793a93a66a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f3cd3027a533dd07220f161c958602.png)
(1)求过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b532b51e584020507d40c057c0527023.png)
您最近一年使用:0次
2017-11-04更新
|
367次组卷
|
2卷引用:内蒙古巴彦淖尔市第一中学2017-2018学年高二9月月考数学试题
名校
解题方法
6 . 已知圆
的方程为
,求过点
的圆
的切线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac5cc668e8073d3ae9eee52652620b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cda9ce6d633bc1f3a249fb0fc458a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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