若圆
上有且仅有两个点到直线
的距离等于
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b04202e468a069e067d00e6416582344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915214095e7786e305562acf3c083026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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更新时间:2020-03-03 21:27:07
|
【知识点】 直线与圆的实际应用
相似题推荐
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【推荐1】苏州有很多圆拱的悬索拱桥(如寒山桥),经测得某圆拱索桥(如图)的跨度
米,拱高
米,在建造圆拱桥时每隔
米需用一根支柱支撑,则与
相距
米的支柱
的高度是( )米.(注意:
≈
)
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937481171501056/2947408915120128/STEM/3ac67bc5-f228-498a-9627-0f6dee99a285.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e935f74b24d67b10c3812afd89acfda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea74571b63e113664d7231f7796eac65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18872eaaf05a420b4028fc031f646db.png)
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937481171501056/2947408915120128/STEM/3ac67bc5-f228-498a-9627-0f6dee99a285.png?resizew=210)
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【推荐2】已知圆心在
轴上的圆
与直线
相切,且截直线
所得的弦长为
,则圆
的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcf9bfbf771cb6118f8e631724314e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9c8f2df321744ddd96c98e3741396e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9deacb75c9fb0b3b0c1ac4d7cc504e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce9a4fe0565a6810452d3fa9c747662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
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