1 . 过抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a4cd7199b171703f8064bc7e7a730f.png)
的焦点
作直线
与抛物线交于
,
两点,则当点
,
到直线
的距离之和最小时,线段
的长度为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a4cd7199b171703f8064bc7e7a730f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088fcdd595455906a1a7080d630611f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b40b35e8c7578ec1ca1eb5c7ca4ddc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2021-10-05更新
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4卷引用:青海省海南州高级中学2021-2022学年高三上学期摸底考试理科数学试题
青海省海南州高级中学2021-2022学年高三上学期摸底考试理科数学试题广西河池市2020-2021学年高二下学期期末数学(理)试题(已下线)9.5 抛物线(精练)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)(已下线)9.4 抛物线(精练)