两圆
和
恰有三条公切线,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4f0e27b178b328c2e632ee9f60b98d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecd659952d5d31061560290978e4afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f164e2348de7d9967b1832004db124.png)
2023高三·全国·专题练习 查看更多[4]
更新时间:2022-09-20 19:07:11
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【推荐1】已知圆
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【推荐2】圆
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,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a369c49e78018ddd4caa09f88acdfa.png)
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【推荐1】若圆
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【推荐2】已知两点M(1,0),N(-3,0)到直线的距离分别为1,3,则满足条件的直线的条数是________ .
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