题目
题型:不详难度:来源:
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-43675.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-39936.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-17918.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-81866.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125835-54650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125835-15405.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125835-83920.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125835-60490.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125835-99329.gif)
(2)若椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-43675.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-89119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-35708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-20910.gif)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-51600.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-43675.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-18002.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-51600.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-89520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-89520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-63206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-95341.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125838-91615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-89520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125838-80832.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125838-99280.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125838-44788.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125839-37342.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125839-40096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125839-49073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125839-25273.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125834-81866.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125839-81170.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125840-34176.gif)
于是
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125840-44139.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-20910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125840-53850.gif)
(3)由题设,显然直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-89520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125840-99643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-89520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125841-89994.gif)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125841-87526.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125835-54650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125838-91615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-51600.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125841-39579.gif)
因为点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125836-51600.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125841-97912.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125838-99280.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125842-69393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125842-84229.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125842-13318.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125837-89520.gif)
核心考点
试题【(本题满分16分)本题共有3个小题,第1小题满分4分,第2小题满分6分,第3小题满分6分.已知椭圆:(),其左、右焦点分别为、,且、、成等比数列.(1)求的值.】;主要考察你对直线的倾斜角与斜率等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125828-21842.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125828-37577.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125828-15863.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125829-62991.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
用半径为R的圆形铁皮剪出一个圆心角为α的扇形,制成一个圆锥形容器,求:扇形的.圆心角多大时,容器的容积最大?并求出此时容器的最大容积.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125818-73894.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125818-55401.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125818-71733.gif)
已知曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125809-42421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125809-90544.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125810-99459.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125810-98556.gif)
(Ⅰ)求曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125809-42421.gif)
(Ⅱ)直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125810-25054.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125809-42421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125810-94266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125810-82206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125810-64093.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125811-94631.gif)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125811-72924.gif)
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-25650.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-56849.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-14030.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-70694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-81071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-98554.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-70694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-16386.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-44547.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-10477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-66559.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-39999.gif)
(I)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-70694.gif)
(Ⅱ)求线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-69207.gif)
(Ⅲ)在线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-69207.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125749-70694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-18602.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-81238.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125751-63829.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022125750-18602.gif)
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