2024高三·全国·专题练习
1 . 已知点
在圆
上运动.求
的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb1d36a3b763dadfd95e9f39a1323fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c790bd36c61e7adf875ba44ec5c2c8.png)
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解题方法
2 . 已知圆O:
圆
:
,则下列结论正确的是______ .
①无论k取何值,圆心
始终在直线
上;
②若圆O与圆
有公共点,则实数k的取值范围为
;
③若圆O与圆
的公共弦长为
,则
或
;
④与两个圆都相切的直线叫做这两个圆的公切线,如果两个圆在公切线的同侧,则这条公切线叫做这两个圆的外公切线,当
时,两圆的外公切线长为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad4920ab4d21e0d600219b5c64cb9a2.png)
①无论k取何值,圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
②若圆O与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26198b53b2b405d5467fb2dc810e36b.png)
③若圆O与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0181723c3b13b5ab2f33d9cdcdd8993e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2015d9a88fb4d8f0520790693abc9649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ad10ac4e53b0502d57c17baf566792.png)
④与两个圆都相切的直线叫做这两个圆的公切线,如果两个圆在公切线的同侧,则这条公切线叫做这两个圆的外公切线,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3813fe97d1c6aec9f40ab23e0f38a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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3 . 已知圆
:
和圆
:
的公共弦所在直线经过原点,则实数a的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38159cf478c0afbe6ef405415f9a2dc5.png)
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4 . 已知直线
与圆
相交于
两点,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3683fd5cbf7b7bdef462a3d38ce4eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be2c91c4ace79b6d3ce4e86681f2b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
A.若圆![]() ![]() ![]() |
B.![]() ![]() |
C.当![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2024-07-11更新
|
505次组卷
|
3卷引用:福建省泉州第五中学2024届高三高考热身测试数学试题
解题方法
5 . 已知圆
与圆
交于A,B两点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c783a9a64c4a4b39cb489cca1391d36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449494fe8f86b483c87997cbfa62fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d103d683d2fd06b6fa9ec5523c2ea0c9.png)
A.![]() | B.5 | C.![]() | D.![]() |
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6 . 两个圆的方程相减得到的方程一定是公共弦的直线方程吗?
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7 . 两圆方程作差得到的方程是公共弦所在直线的方程吗?
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名校
8 . 已知
,则下述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de6946332b110b6954faf96382eda90.png)
A.圆C的半径![]() |
B.点![]() |
C.圆C与圆![]() ![]() |
D.圆![]() |
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2024高三·全国·专题练习
9 . 已知圆
和圆外一点
,过点
作圆的切线,切点分别为
,求过切点
的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc2b3dc3b52978dfce3ddb62a1e168b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c09b41032e4722c412c2e2427500a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
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