1 . 已知圆
,过直线
上一点
作圆
的两条切线,切点分别为
、
则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cf6ad8c72c43348c4adb8855c1148e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8a82a007d596239d4778c7d540e7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() ![]() ![]() ![]() |
B.![]() ![]() |
C.直线![]() ![]() |
D.若圆![]() ![]() ![]() |
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2 . 如图,已知圆
,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/368bb56c-e4e7-497f-80bc-2180328d59da.png?resizew=170)
(1)求圆心在直线
上,经过点
且与圆
相外切的圆
的方程;
(2)若过点
的直线
与圆
交于
两点,且圆弧
恰为圆
周长的
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4f3c34833a9b2d3487f009e8cb8792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaf13627819890607661d8eb55efa83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/368bb56c-e4e7-497f-80bc-2180328d59da.png?resizew=170)
(1)求圆心在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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3 . 已知A,
是圆
上两点,且
.若存在
,使得直线
与
的交点
恰为
的中点,则实数
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee0441a49fcec09ef0366231e9a2b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec0e1a9c21a11c369b2c2e77bdd4148f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b592328c8995d0483353b3a3a45b7cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4 . 若圆
与圆
有公共点,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6c7034e7c0b0b0f3515d8ae7b52f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d44b835f37100a5f0c5506a6aa1c8c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知圆
:
,点
为直线
:
上一动点,点
在圆
上,以下四个命题表述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d61985901c2bc698d72ac88f4e1eb65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b40b35e8c7578ec1ca1eb5c7ca4ddc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.直线![]() ![]() |
B.圆![]() ![]() |
C.过点![]() ![]() ![]() ![]() ![]() ![]() |
D.过点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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4卷引用:福建省福州市长乐第一中学2023-2024学年高二上学期1月月考数学试题
福建省福州市长乐第一中学2023-2024学年高二上学期1月月考数学试题广西2024届高三高考桂柳鸿图模拟金卷试题(三)江西省吉安市峡江中学2023-2024学年高二上学期期末数学试卷(九省联考题型)(已下线)专题2 与圆有关的最值问题【练】(压轴小题大全)
6 . 已知圆
与圆
相交于A,
两点.
(1)求公共弦
的长![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
(2)求圆心在直线
上,且过A,
两点的圆的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1e78935ba82d6cf995a10260054bd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45fafda969dd7b8e0bb704a51295178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求公共弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
(2)求圆心在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
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7 . 已知圆
,直线
,点
在直线
上运动,直线
分别切圆
于点
.则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e948b27f4756cb8ad3cbbbaf13e1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814364e874a81f19b4570df961b42df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
A.四边形![]() ![]() |
B.![]() ![]() ![]() |
C.直线![]() ![]() |
D.![]() ![]() ![]() |
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8 . 已知:圆
与圆
.
(1)当
时,判断两圆是否相交,并说明理由.如果相交,求公共弦所在直线的方程.
(2)若两圆外切,求
的值及外公切线的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70feca8eac775ebee7b6d9760e2be6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31e5fe07b9216105ec1c8b3b9915d10.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94174f37421d296a192b2df66c05f875.png)
(2)若两圆外切,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
9 . 圆
和圆
的交点为A,B,则有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae972938877d697690ae10acdc00e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc105df25e5bb88566675284a29d9b0b.png)
A.公共弦AB所在直线方程为![]() |
B.公共弦AB的长为![]() |
C.线段AB中垂线方程为![]() |
D.![]() |
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10 . 已知圆
:
,点
,
,在圆
上存在点
,使得
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee350ac3584c0794aa0d636db2ffea6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea8f7a80bdd8b95b88103efa57006d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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