抛物线
的焦点到圆C:
上点的距离的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a56449ad6dd65aec7525c94273f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dc46b8da6e54c9bd73760fd23723c8.png)
A.0 | B.4 | C.5 | D.6 |
更新时间:2023-11-29 18:50:42
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【推荐1】已知复数
满足
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eea388ba1726f4b6667c76100b2c2b1.png)
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A.![]() | B.2 | C.![]() | D.3 |
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【推荐2】已知双曲线
的左、右焦点分别为
,实轴长为2,渐近线方程为
,
,点N在圆
上,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a308b980f486306256e425a1a1018b4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91fcb2d2b99c2febd78712da3051d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678c4630ad672cfa381c693b04d30d39.png)
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A.![]() | B.2 | C.![]() | D.3 |
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解题方法
【推荐1】过抛物线
焦点F的直线与抛物线交于A,B两点,
,抛物线的准线l与x轴交于点C,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839b8de04116aaaed4f4cca2e107cd36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2171a7e806dc496b06bfe0a3a043e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知过抛物线y2=2px(p>0)的焦点F的直线与抛物线交于A,B两点,且
3
,抛物线的准线l与x轴交与点C,AA1垂直l于点A1,若四边形AA1CF的面积为
,则准线l的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b59d7dc1a0603a0379445fafeb376c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc3fe4dd2a5fec23164d424ea9a229f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b75ffbd5d28410a2c971bdcba6a2db.png)
A.![]() | B.![]() | C.x=﹣2 | D.x=﹣1 |
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