已知抛物线E:
上任意一点P到直线
的距离比到焦点F距离大1.
(1)求抛物线E方程;
(2)若A,B,C是抛物线上不同的三点,点
是AB中点,且焦点F是
重心,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
(1)求抛物线E方程;
(2)若A,B,C是抛物线上不同的三点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d397a41e95c55962a92045b137336bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66ad819d538c2f61f48b283ed1ef13.png)
更新时间:2020-03-12 19:22:55
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适中
(0.65)
【推荐1】已知椭圆
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(1)求椭圆C1与抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5f908de329f349775ab1d1733c702a.png)
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适中
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【推荐2】如图,已知直线
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且与直线
垂直的直线交抛物线的准线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/27abd73b-a181-43a3-885e-43a476d36cf0.png?resizew=151)
(1)求抛物线的标准方程;
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/27abd73b-a181-43a3-885e-43a476d36cf0.png?resizew=151)
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a13b96e3b4887e097bd00153dc66941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】在两个条件①
;②
中任选一个,补充在下面的问题中.
已知直线
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已知直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a47e29a1f84b0e21548f7f6ca5ae63.png)
(2)若______,求实数m的值.
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【推荐2】已知抛物线
:
(
)的准线过双曲线
(
)的左焦点.
(1)求抛物线
的方程;
(2)设抛物线
的焦点为
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:
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,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
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您最近一年使用:0次
【推荐1】已知抛物线的方程是
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(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
(1)若弦AB的中点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86022205a7487439dd8d0897cd3bf19.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b8b0499988ee9f02f3c0ef389deb1b.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐2】过点
的直线
与抛物线
:
相交于
,
两点.
(1)求
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(2)若
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时,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56ab70e602f2e2e291df643ab209162.png)
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(1)求
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(2)若
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