已知抛物线
的图像过点
,则该抛物线的焦点到准线的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb573fb6f6f37fd615e35c4073c2919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad20e2bc6576fc461419f8f138d26e7.png)
22-23高二上·吉林长春·期末 查看更多[3]
吉林省长春市实验中学2022-2023学年高二上学期期末数学试题(已下线)模块一 专题4 圆锥曲线 期末终极研习室(2023-2024学年第一学期)高二人教A版(已下线)专题3.3 抛物线(6个考点十大题型)(1)
更新时间:2023-09-28 13:33:26
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【知识点】 抛物线定义的理解
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真题
【推荐1】下列四个命题中,真命题的序号有____________ .(写出所有真命题的序号)
①将函数
的图象按向量
平移,得到的图象对应的函数表达式为
;
②圆
与直线
相交,所得弦长为2;
③若
,则
;
④如图,已知正方体
,
为底面
内一动点,
到平面
的距离与到直线
的距离相等,则
点的轨迹是抛物线的一部分.
①将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f58bad098fdd79b12c9c66daa46c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e05157a495f41245f2b35cd3be3310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369cd88d4c35ed3ca34aad3ee6a3c946.png)
②圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c404c221810c4b661d2dc668f0c4248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d585d2d6643471640905d234d9538c5.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f9b3f601916f666f701224f77c4565c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a63836835fdb5c5526320c874fe43af.png)
④如图,已知正方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7253ffd3fc633d861810ee2e872188b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/a969b2b9-5301-4fca-8a02-fc30ba425866.png?resizew=136)
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【推荐2】已知抛物线C:
的焦点为F,点A在C上,且
.若B为曲线M:
上一点,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d609cb7f8b4d79e8b65c0b8a0672d240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5647c704746c0ac4ba61a4eabd9171d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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