已知在平面直角坐标系中,A,B两点的坐标分别为
,若经过A,B两点的圆与x轴正半轴相切,则该圆的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09903807c2197aec8e32b55ef6033502.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
21-22高二上·广东广州·阶段练习 查看更多[2]
更新时间:2021-12-14 06:27:16
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【推荐1】在平面直角坐标系
中,
为坐标原点双曲线
的右焦点为
,则以
为圆心且与双曲线的渐近线相切的圆方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c477e5ade921ffa8377c4719319380ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知直线
与以点
为圆心的圆相交于A,B两点,且
,则圆C的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb31826e94cde6199ed7f93139f3e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f0ee968f9a247871a54e505fbd111b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45224f7eac9d0cef64bf28d93e7721a4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
【推荐1】已知圆
交
轴于A,
两点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0a0eb0ea8c4b46bc188035e8ed6757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d103d683d2fd06b6fa9ec5523c2ea0c9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】圆
的圆心坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f985208422da1ea7b10f168635487ca3.png)
A.(1,2) | B.(-1,2) | C.(1,-2) | D.(-1,-2) |
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【推荐1】已知直线
是圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9694c1591b2e613b0fb4485b53ea08.png)
的对称轴,过点A
作圆C的一条切线,切点为B,则|AB|=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ffaf9b5b904c852f901858dbf03265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9694c1591b2e613b0fb4485b53ea08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50f20cfa4b1b4b2f71ffce491acdf1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332452d07871f44ba7e24774d183ae04.png)
A.1 | B.2 | C.4 | D.8 |
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【推荐2】过点
作圆
的两条切线,切点分别为B,C,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174541741f9d18ca1394943abd2ed0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3285a2383fa18025034cf9876175295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a5c5354a353046e062fd14c722e6c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e40e3883271c3580c1d3c805dcac6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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