题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-12195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-63477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-41271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-86741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044338-59755.png)
A.![]() | B.![]() | C.0 | D.4 |
答案
解析
分析:由题设知b=
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044338-93273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-86741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-90260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-51199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-89221.png)
解答:解:∵双曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-12195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-89236.png)
∴b=
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044338-93273.png)
把点
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044337-86741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-13877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-49295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-90260.png)
∴P(
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-74425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-54295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-62593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-51199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-89221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-74425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-74425.png)
或P(
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-74425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-54295.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-62593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-51199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044339-89221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-74425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044340-74425.png)
故答案为0.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044332-81461.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044332-53899.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044333-45135.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044326-46426.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044326-51747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044324-97360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044324-52690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044320-89077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044320-55530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044320-86778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044320-71030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044320-75722.png)
A.相交 | B.相切 | C.相离 | D.以上情况都有可能 |
已知实轴长为2a,虚轴长为2b的双曲线S的焦点在x轴上,直线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044306-51715.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044306-86630.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044306-57106.gif)
(I)求双曲线S的方程;
(II)若双曲线S上存在两个点关于直线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024044306-92210.gif)
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