1 . 已知抛物线
的焦点为
,准线与
轴的交点为
,点
在抛物线
上.
(1)求抛物线
的方程.
(2)若直线
与抛物线
交于另一点
,证明:
为定值.
(3)过点
作圆
的两条切线,与
轴分别交于
两点,求
面积取得最小值时对应的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430cd4dfec1c0932fe44320a3ef85171.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/48d195911a91d12edd5685f6cd963fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1990dc712e4585d9ac72954ade87afd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b08292f69bc66ef118a4f1d4d29e25.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/205e94db974775cda3ef5bea7ef622ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
2 . 已知点A(1,2)在抛物线C∶
上,过点A作两条直线分别交抛物线于点D,E,直线AD,AE的斜率分别为kAD,kAE,若直线DE过点P(-1,-2)
(1)求抛物线C的方程;
(2)求直线AD,AE的斜率之积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
(1)求抛物线C的方程;
(2)求直线AD,AE的斜率之积.
您最近一年使用:0次
2022-01-03更新
|
627次组卷
|
4卷引用:浙江省温州市乐清市知临中学2021-2022学年高二上学期期中数学试题
名校
解题方法
3 . 已知抛物线
的焦点为
,且
为圆
的圆心.过
点的直线
交抛物线与圆分别为
,
,
,
(从上到下).
![](https://img.xkw.com/dksih/QBM/2021/11/28/2861025593606144/2861191752048640/STEM/c729d0d5-a3f0-45c5-b113-bbef70eed0c6.png?resizew=172)
(1)求抛物线方程并证明
是定值;
(2)若
,
的面积比是
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.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/e6316e0e6da742e9b035d8f2cc91a4dd.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2021/11/28/2861025593606144/2861191752048640/STEM/c729d0d5-a3f0-45c5-b113-bbef70eed0c6.png?resizew=172)
(1)求抛物线方程并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc61ca14a0dcaa5806e8d8b7f926bad.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4686f39b38d5b90309ee73ed89a0640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320896d1b4b9217d9ba527604ac35d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2021-11-28更新
|
593次组卷
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5卷引用:浙江省温州新力量联盟2020-2021学年高二下学期期中联考数学试题
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