题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000950-65716.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:抛物线的准线方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000950-65716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000952-64267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000952-21274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000952-42174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000952-24466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000953-55727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000953-67616.png)
点评:熟练掌握抛物线方程及其性质是解决此类问题的关键,属基础题
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000945-88978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000946-26473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000946-47831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000946-50442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000946-86097.png)
A.![]() | B.![]() | C.2 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000940-23514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000940-59248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000940-96949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000940-58819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000941-32939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000941-66166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000927-94896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000928-65238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000928-41261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000928-65238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000928-39826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000928-99461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000929-10354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000929-87537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000929-23537.png)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000930-25842.png)
(Ⅱ)若过
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000930-76796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000930-25842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000930-99245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000930-11506.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000931-78303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000930-25842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000931-28138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000931-55484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000931-96408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000921-81029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000921-45832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000921-73346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000921-81029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000921-74073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000922-31669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000922-40103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000922-86298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000922-24591.png)
A.![]() | B.![]() | C.![]() | D.![]() |
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000908-28175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000909-43862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000909-31739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000909-85628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000910-76436.jpg)
(Ⅰ)求椭圆E的方程;
(Ⅱ)设椭圆E的上下顶点分别为A1,A2,P是椭圆上异于A1,A2的任一点,直线PA1,PA2分别交
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026000910-34464.png)
证明:线段OT的长为定值,并求出该定值.
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