给出下列条件:①焦点在
轴上;②焦点在
轴上;③抛物线上纵坐标为l的点
到其焦点
的距离等于2;④抛物线的准线方程为
.
(1)对于顶点在原点的抛物线
:从以上四个条件中选出两个适当的条件,使得抛物线
的方程是
,并说明理由;
(2)经过点
的动直线
与抛物线
交于
两点,在
轴上是否存在定点
使得
?若存在,求出
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
(1)对于顶点在原点的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
(2)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b378e03d75c73c8ca71f991a8c07729a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbc7eee4d7d392bd26a438e15ac59a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
20-21高二下·重庆九龙坡·阶段练习 查看更多[2]
重庆市育才中学校2020-2021学年高二下学期第一次月考数学试题(已下线)3.3.2抛物线的简单几何性质(备作业)-【上好课】2021-2022学年高二数学同步备课系列(人教A版2019选择性必修第一册)
更新时间:2021-09-14 21:20:32
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【推荐1】已知椭圆C:
的一个焦点与抛物线
的焦点相同,且椭圆C上一点与椭圆C的左,右焦点
构成的三角形的周长为
.
(1)求椭圆C的方程;
(2)若直线
与椭圆C交于A,B两点,O为坐标原点,
的重心G满足:
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5545195ade2bda359e683715332e83.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2b42b76abb6aca31dabaaf2456825d.png)
(1)求椭圆C的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba49e49f352e9c5289d8538ebf905b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63dad9685c3521281a4ba819ff3c77bb.png)
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【推荐2】已知椭圆
:
的左、右焦点分别为
、
,且
也是抛物线
:
的焦点,
为椭圆
与抛物线
在第一象限的交点,且
.
(1)求椭圆
的方程;
(2)设动直线
与椭圆
交于
,
两点,存在一点
使
,判断直线
是否经过定点?若是,求出定点的坐标;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f2a72c6d7780757ab065fb29f47526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2302846ec9dbd2cdf1b5ba0c13c2935d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】已知抛物线
的焦点为F,O为坐标原点,抛物线E上不同的两点M,N只能同时满足下列三个条件中的两个:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/9213fde3-fd3d-4276-a35d-b8819080b029.png?resizew=212)
①
;②
;③直线MN的方程为
.
(1)问M,N两点只能满足哪两个条件(只写出序号,无需说明理由)?并求出抛物线E的标准方程;
(2)如图,过F的直线与抛物线E交于A,B两点,过A点的直线l与抛物线E的另一交点为C,与x轴的交点为D,且
,求三角形ABC面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c42d88e496a17562d25195301e0ac2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/9213fde3-fd3d-4276-a35d-b8819080b029.png?resizew=212)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083f25c5e40f66fd2686dbce367e382c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0228c5c84ed7c887586a74d830643759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c186c9807b15be3f5415a4bd185b70db.png)
(1)问M,N两点只能满足哪两个条件(只写出序号,无需说明理由)?并求出抛物线E的标准方程;
(2)如图,过F的直线与抛物线E交于A,B两点,过A点的直线l与抛物线E的另一交点为C,与x轴的交点为D,且
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【推荐2】已知椭圆
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、
的值,并判断抛物线
的焦点是否在直线
上;
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的焦点在直线
上.
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624dffd30b66a5e4de57362b32b2a3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】已知椭圆
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(2)是否存在定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐2】已知椭圆
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
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(2)是否存在点P,使得过点P作圆
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您最近一年使用:0次