已知抛物线
的焦点是圆
的圆心,则抛物线
的准线方程是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bfb456096a1bd4f2a508448db7edc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f88a1f65259e92a9bae9f15abf1adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
20-21高二下·安徽·阶段练习 查看更多[3]
安徽省名校2020-2021学年高二下学期阶段性大联考理科数学试题(已下线)专题13 抛物线 - 2021--2022高二上学期数学新教材配套提升训练(人教A版2019选择性必修第一册) (已下线)考点13 抛物线-备战2022年高考数学学霸纠错(新高考专用)
更新时间:2021-07-12 17:13:09
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【推荐1】圆
的圆心坐标为_________ ,半径为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6784d1db92c83f48fa66330cc7d94f2f.png)
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【推荐2】设
,过两定点
和
分别引直线
和
,使与抛物线
有四个不同的交点.当这四点共圆时,求这种直线
与
的交点
的轨迹为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e14206c7d228a7c2259a7b27da8813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5612d598e27ac2ce0ab89fb63538bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8953ded144195804384dcb494d5e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
【推荐1】已知抛物线
的焦点为
,
为坐标原点,点
在
上,且
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b527ec9f92467b8f24554a2a67ee987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d6f360b3cfefdabb0b966a1a86d895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308a9f21904b5ac3c3631196239b7f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
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【推荐2】已知点
在抛物线
上,则抛物线焦点
的坐标为________ ;设平面内一定点
,射线
与抛物线的交点为
,与其准线的交点为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc15e96b6b31b191cefd477d41f7e22.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32366143230ca122894a4bada7c7b96d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc15e96b6b31b191cefd477d41f7e22.png)
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