名校
1 . 已知N是圆
上的动点,点M满足
,记M的轨迹为E,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc12c55f2676aeb4f696f4a84e4d65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd28112db502b0edb609e501fcb650b.png)
A.E是与圆O相切的一条直线 | B.E是半径为5的圆 |
C.E上的点到原点O的距离的最大值为8 | D.E与圆O相切 |
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解题方法
2 . 已知点
关于直线
的对称点Q落在圆
上,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770a2ff3d5db3153534f0641c51ef02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3016baf1a9ce777f16ea9ce469b2510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde63dfa184f0354c10e59578a4d7eb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.1 | B.![]() | C.![]() | D.0 |
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3 . 已知点
是圆
上的动点,以
为圆心的圆经过点
,且与圆
相交于
两点.则点
到直线
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451fc6e4248b63e70595f23842f06c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.不是定值 |
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|
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|
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4 . 已知圆
和两点
为圆
所在平面内的动点,记以
为直径的圆为圆
,以
为直径的圆为圆
,则下列说法一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51c2a5f44e72ae2911b2039fd4e8d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
A.若圆![]() ![]() ![]() ![]() |
B.若圆![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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|
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解题方法
5 . 已知圆
,抛物线
的焦点为
,
为
上一点( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba59aec3e9c4668120db544d063c7cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01497894422204f9e205d832e21aa29b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
A.存在点![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若以![]() ![]() ![]() |
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解题方法
6 . 平面直角坐标系xOy中,已知点
,
其中
,若圆
上存在点P满足
,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f236182642bce92ffb3668b325ea5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7933ce51482d8add3c4142ddeed2b11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdaaf8eb027e013643a47e8222a1231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66dc1e735a8b4326e34e2784d536c255.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 已知圆M:
和圆N:
相交于A,B两点,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85300de5f398c86e24b52e0a2298f6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca2415dee662897b676734cfc768d66.png)
A.直线AB的方程为![]() |
B.若点P为圆N上的一个动点,则点P到直线AB的距离的最大值为![]() |
C.线段AB的长为![]() |
D.直线![]() |
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8 . 已知
是圆
上的动点,点
满足
,记点
的轨迹为
,若圆
与轨迹
的公共弦方程为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9266294e2cb93fb76d4f53e46e9dff68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724f5908dc495a4b21a1167768217b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff23609c2c115bf63d954ff587894e1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
9 . 若过点
向圆C:
作两条切线,切点分别为A,B,则直线AB的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bd4e5049fa304e4d352bfe6dee455d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 已知直线
与直线
相交于点
,且点
到点
的距离等于1,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d6790fb30b961803dc860275b521573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58aa7e92a43011355af56a2dc538a8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7374faef204b601022ace1f0a53c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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