抛物线
的焦点为F,设
是抛物线上的两点,
,则∠AFB的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37657f68167531cc235f5f85961c73a6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2021·陕西宝鸡·模拟预测 查看更多[3]
陕西省宝鸡市2021届高三下学期大联考理科数学试题(已下线)考点20 基本不等式-备战2022年高考数学(理)一轮复习考点微专题(已下线)9.5 抛物线(精讲)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)
更新时间:2021-05-25 09:53:55
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【推荐2】若
都是正实数,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b07640734e5bc0aff46df6c1af84337.png)
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单选题
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适中
(0.65)
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解题方法
【推荐1】已知以F为焦点的抛物线
上的两点A,B,满足
,则弦AB的中点到C的准线的距离的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b7b252ee7cd2bc923292830410deb4.png)
A.2 | B.![]() | C.![]() | D.4 |
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【推荐2】过抛物线
的焦点
作斜率分别为
,
的两条不同的直线
,
,且
,
与
相交于点
,
与
相交于点
.分别以
、
为直径的圆
、圆
(
为圆心)的公共弦记为
,则点
到直线
的距离的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d087313c8bc308b2a5832d6d3dd85174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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