题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092906-86989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092906-45798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092906-23756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092907-30727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092907-68460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092907-61851.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092907-98189.png)
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092907-68460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092906-86989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092906-86989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092908-15690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092908-37308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092908-41650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092908-51339.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092902-47643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092902-69712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092903-24520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092903-40831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092903-24520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092903-15081.png)
(1)若直线AB过抛物线C的焦点F,求证:动点P在一条定直线上,并求此直线方程;
(2)设C、D为直线l1、l2与直线x = 4的交点,求
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092850-74584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092835-81681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092835-49652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092835-35516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092836-50654.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092836-75335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092836-25670.png)
(2)如图,设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092836-39984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092836-69490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092837-86341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092837-93551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092837-26348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092837-97602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092837-72261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092838-30301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092838-93255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092838-59547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092828-62499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092828-21609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092828-84446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092828-11836.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092819-38870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092819-45595.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092819-15399.png)
(1)求证:直线CD的斜率为定值;
(2)延长DC交x轴负半轴于点E,若EC : ED =" 1" : 3,求
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092819-57108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092820-34338.jpg)
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