1 . 过点
作圆
:
的两条切线,切点分别为
,
,则原点
到直线
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25e326fdf9e5456f48e8a99a069f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be51ca81c4e72ec876fa31cf705373b.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
2 . 已知圆
,圆
与
轴相切于点
,与
轴正半轴交于A,B两点,且
,则圆
和圆
的公共弦所在的直线方程为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bacfc149ede71417fa599c21b5a84cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f23420529a6a808d22d454e87a6194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2024·江苏连云港·模拟预测
名校
解题方法
3 . 设a,b为实数,已知圆O:
,点
在圆O外,以线段
为直径作圆M,与圆O相交于A,B两点.下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8544f8483269db90305fa747eeac8b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
A.当![]() ![]() |
B.当![]() ![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.若圆O上总存在两个点到点Q的距离为1,则![]() |
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4 . 圆
与圆
的公切线的方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd83d733037f9c4305f4e3a7f5bbe142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e7abf8f29e5b328f3090171da09724.png)
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5 . 古希腊数学家阿波罗尼斯的著作《圆锥曲线论》中有这样一个结论:平面内与两点距离的比为常数
(
)的点的轨迹是圆,后人称这个圆为阿波罗尼斯圆.已知点
,
,动点
满足
,若点
的轨迹与圆
:
(
)有且仅有三条公切线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472393b18c7880e73b40e31fbe2d951c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e2db2888cf296b8f56c3702dcd8435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdb7b37d9b96793ec84d60bef24586f.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/a8a2b1f5228d0dd50ae4c229b8c64da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ba6b6aa6c3f9faba6b03bc193a6e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e40e3883271c3580c1d3c805dcac6.png)
A.![]() | B.1 | C.2 | D.3 |
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6 . 已知圆N:
,直线
,圆M与圆N外切,且与直线
相切,则点M的轨迹方程为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff92e07d0e87dcd417c0e51db24f081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
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7 . 若圆
上存在唯一点
,使得
,其中
,则正数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de6a1e808d742bf555762a4a414d6c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a06b9d194a598a77d0d0a7548800c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知圆
:
,圆
:
,直线
与圆
分别相交于
四点,若
,则直线
的方程可以为___________ .(写出一条满足条件的即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce55b832477a2d3a86c790edd134ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311be70cc08c982e8c5d4a0b4da22182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
9 . 圆
与圆
的公共弦长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d5ec34c7bb0da25d361b8042e7d342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c0f725064d05af89e84e1297245172.png)
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10 . 已知圆
,若圆C上有且仅有一点P使
,则正实数a的取值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c8ed5ecf78bd5ab1d0130a1722b3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
A.2或4 | B.2或3 | C.4或5 | D.3或5 |
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