在平面直角坐标系xOy中,直线
(t为参数)与圆
(θ为参数)相切,切点在第一象限,则实数a的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7104c3057e205ebe3412c15f3002dcd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b951b1898079b558ccfb555da9a33d1a.png)
更新时间:2021-01-17 07:33:08
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【推荐1】写出一个同时满足下列条件①②的圆
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①圆
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,
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①圆
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【推荐2】直线l:
上存在两个不同的点到点
的距离为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46de5f5993e7dcd0e828081045e502af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71885f023172807ad43f2c9a670aa960.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981181389439f73b8791a9e291ef87f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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