已知圆
,当圆C的面积最小时,直线
与圆C相切,则实数a的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345b2be3c00f20c074d12874b767ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f00592545c6df0a8ee5f6519b2975b2.png)
更新时间:2022-10-11 13:33:56
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【推荐1】在平面直角坐标系xOy中,已知点
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【推荐2】已知直线x+y-k=0(k>0)与圆x2+y2=4交于不同的两点A,B,O是坐标原点,且有|
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【推荐1】已知
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【推荐2】若圆
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdc804a72cf17db1fc345cf4b57bfec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2caf6048aa0807d8ba591963ff6e2.png)
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