直线
被圆
所截得的弦长是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ab3a7eb0f59993c7608576e47c0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4a8147f0c33734e69a0542f309de15.png)
更新时间:2023-11-06 20:03:41
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【知识点】 圆的弦长与中点弦
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【推荐1】设曲线
的参数方程为
(
为参数),直线l的参数方程为
(
为参数),则直线l与曲线C截得的弦长为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252558a19b8403b46c15a14457808281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0aa3121ec8329b1f075d4fdec5dac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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