1 . 设抛物线
:
的焦点为F,经过x轴正半轴上点
的直线l交
于不同的两点A和B.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/3bb2947c-7eb2-411b-b205-731ccde56cd0.png?resizew=169)
(1)若
,求A点的坐标;
(2)若
,求
的值;
(3)若
,且直线
,
与
有且只有一个公共点E,问:
的面积是否存在最小值?若存在,求出最小值,并求出M点的坐标;若不存在,请说明理由(三角形面积公式:在
中,设
,
,则
的面积为
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/3bb2947c-7eb2-411b-b205-731ccde56cd0.png?resizew=169)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48276435f2fa9c0e510be76df906b96e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b0ba14e41e306e5633ad4bf1cdedd8.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1683899c08a58eeb25a917dfab3e7b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73167471b003bb245bdc952d1a36e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49830e1af740638d68a1c06379e4ae04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bac07538f25bb48ed4853686c3a8a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58ad468fd2b5c4523ec51c27e9c1452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a113e8fc18c7740c4e94d74f43587c.png)
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名校
解题方法
2 . 过抛物线
的焦点
作直线交抛物线于
,
两点,
为线段
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.以线段![]() ![]() |
B.以线段![]() ![]() |
C.当![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2022-03-25更新
|
969次组卷
|
5卷引用:重庆市主城区六校2021-2022学年高二上学期期末联考数学试题
名校
解题方法
3 . 已知抛物线
的焦点为
,过点
的直线
交抛物线于
、
两点,以线段
为直径的圆交
轴于
、
两点,设线段
的中点为
,则( )
![](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/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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() |
B.若![]() ![]() ![]() |
C.若抛物线上存在一点![]() ![]() ![]() ![]() |
D.若点![]() ![]() ![]() ![]() |
您最近一年使用:0次
2020-12-23更新
|
1254次组卷
|
6卷引用:专题13 《圆锥曲线与方程》中的存在性问题(2)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
(已下线)专题13 《圆锥曲线与方程》中的存在性问题(2)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册) 江苏省南京市六校联合体2020-2021学年高三上学期12月联考数学试题河北省石家庄市第二中学2022届高三下学期3月月考数学试题河北省廊坊市第一中学2023届高三上学期11月月考数学试题吉林省延边州2023届高三统考二模数学试题(已下线)专题09 平面解析几何
解题方法
4 . 已知抛物线
的焦点为
,过点
的直线
依次交抛物线及圆
于
四点,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/d9df0d79e42d86b0def4caa10dffa75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641e7ba6a513e5c2381c98fa268361b6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次