过点
与圆
相切的直线方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fe34d47ef23e8884a5c0404e54ef54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b7f03a4a0e4c13c4364d64db75d022.png)
更新时间:2017-10-31 14:39:31
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【推荐1】过点
的直线
,被直线
,
所截得的线段
的中点恰好在直线
上,则直线
的方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d421a95a20183c59448153a5c6b09a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45da5274c10846965055213dff91b2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8544f4388533c2b0adf3e2b98a2e0b03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6814ac85623c5941aceb171d4b95e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知点
,点
,写出线段
的垂直平分线的方程_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4532ba92e0f7a204202bbd725a9212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ccf3056a064f7d59f697b3e97682bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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填空题-双空题
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【推荐1】如图1,某圆拱形桥一孔圆拱的平面示意图,已知圆拱跨度
,拱高
,建造时每间隔
需要用一根支柱支撑,则支柱
的高度等于__________ m(精确到
).若建立如图2所示的平面直角坐标系
,则圆拱所在圆的标准方程是__________ .
(可用参考数据:
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b019a7e50ec1de63e13a1d0c768c24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3354992abc1fb87c80c72649175d3dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae97d7f57b159b72a23eb909b74d7c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635bc90ea3c6d48d924fb5607ef0f68b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
(可用参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b200ce00321ec0aeec72e52f8daad33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/eb09dbca-56e0-4495-bac4-bb1805ecc67d.png?resizew=601)
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【推荐2】圆
与直线
的位置关系是相离,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad893a2b7da84a06fc43f748071440e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d52b2c4d2f8e699ac4b2b4565667b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】直线l过
且与圆
相切,则直线l的方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b73c488227ec6f650db8e2d0994b765.png)
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名校
【推荐2】若直线
是曲线
和圆
的非坐标轴的公切线,则直线
的方程斜率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f946105ea034c88605feee81964e43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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