1 . 直线l经过抛物线
焦点
,且与抛物线相交于
,
两点,通过点A和抛物线顶点的直线交抛物线的准线于点D.
(1)若直线l的斜率为2,求线段AB的长;
(2)求证:直线DB平行于抛物线的对称轴.
![](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/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
(1)若直线l的斜率为2,求线段AB的长;
(2)求证:直线DB平行于抛物线的对称轴.
您最近一年使用:0次
2 . 直线
经过抛物线
的焦点
,且与抛物线相交于
,
两点,过点
和抛物线顶点的直线交抛物线的准线于点
.
(1)若直线
的斜率为
,求线段
的长;
(2)求证:直线
平行于抛物线的对称轴.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](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/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
您最近一年使用:0次
名校
解题方法
3 . 已知抛物线C:y2=2px的焦点为F(1,0),过F的直线l交抛物线C于A,B两点,直线AO,BO分别与直线m:x=-2相交于M,N两点.
![](https://img.xkw.com/dksih/QBM/2023/2/15/3175330937380864/3176837500977152/STEM/4ce0c28dd68244a89fa275abd6053505.png?resizew=197)
(1)求抛物线C的方程;
(2)求证:△ABO与△MNO的面积之比为定值.
![](https://img.xkw.com/dksih/QBM/2023/2/15/3175330937380864/3176837500977152/STEM/4ce0c28dd68244a89fa275abd6053505.png?resizew=197)
(1)求抛物线C的方程;
(2)求证:△ABO与△MNO的面积之比为定值.
您最近一年使用:0次
4 . 设抛物线
的焦点为F,直线x-my-n=0过F且与抛物线交于A、B两点.
(1)若
,求m的值;
(2)O为原点,直线OA与抛物线准线交于C,求证:直线BC平行于x轴.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ed9d97b8745ed1c15349ea3fffc299.png)
(2)O为原点,直线OA与抛物线准线交于C,求证:直线BC平行于x轴.
您最近一年使用:0次
2023-02-07更新
|
258次组卷
|
2卷引用:沪教版(2020) 选修第一册 高效课堂 第二章 2.6 复习与小结(2)
名校
解题方法
5 . 已知
为坐标原点,直线
与抛物线
相交于
两点.
(1)求证:
;
(2)求
的面积S.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bb03b6d5212ba3a80fd4afbc8b54c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772871e4bcadfd2e14cbd1bb8ad42dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85af7dc06bccad38c31fa6c8a564837b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca18ef35576fa331defd7ea388abb9a1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f443bf12cdb8a280fe6a633d5486f3.png)
您最近一年使用:0次
名校
解题方法
6 . 直线
经过抛物线
焦点F,且与抛物线相交于
两点,通过点
和抛物线顶点的直线交抛物线的准线于点
.
(1)若直线
的斜率为1,求线段
的长;
(2)求证:直线
平行于抛物线的对称轴.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
您最近一年使用:0次
名校
解题方法
7 . 已知抛物线
的焦点为
,过点
且垂直于
轴的直线交
于
,
两点,
为坐标原点,
.
(1)求
的方程;
(2)过点
作两条互相垂直的直线
,
,直线
与
交于
,
两点,直线
与
交于
,
两点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a21beb3c88e85fd5891d3a98fdd9ae.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d4a068dc7561829d3313989d00e2bf.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170e5779c8e030cb3a91fd04e0b3e962.png)
您最近一年使用:0次
2022-01-22更新
|
576次组卷
|
2卷引用:山西省运城市康杰中学2021-2022学年高二上学期期末数学试题
解题方法
8 . 经过点
且倾斜角为45°的直线与抛物线
相交于
两点,其中
为坐标原点.
(1)求证:
;
(2)求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4872a20fc392c0e368aa3bfe3d8037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解题方法
9 . 已知顶点为
的抛物线
与直线
相交于不同的
,
两点.
(1)求证:
;
(2)当
时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018d29fbd23afb4c465c9c5c8fd42eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc66cd5ccd5a579a42c6a241c62d764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
您最近一年使用:0次
名校
解题方法
10 . 已知过抛物线
的焦点,斜率为
的直线交抛物线于两点
、
,其中
,且
.
(1)求该抛物线的方程;
(2)设O为坐标原点,过点A作抛物线的准线的垂线,垂足为C,证明:B、O、C三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f8f90945248cc2efad926c27f6b15e.png)
(1)求该抛物线的方程;
(2)设O为坐标原点,过点A作抛物线的准线的垂线,垂足为C,证明:B、O、C三点共线.
您最近一年使用:0次
2020-12-18更新
|
83次组卷
|
2卷引用:江苏省镇江市2020-2021学年高二上学期12月校际联考数学试题