名校
1 . 直线
与双曲线
交点的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1eebd4438a9d4935914888275ab988e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c47a8427546e894f92d0fd52a7e3c5.png)
A.0 | B.1 | C.2 | D.4 |
您最近一年使用:0次
2010·黑龙江·三模
解题方法
2 . 已知直线
与双曲线
,有如下信息:联立方程组
消去
后得到方程
,分类讨论:(1)当
时,该方程恒有一解;(2)当
时,
恒成立.在满足所提供信息的前提下,双曲线离心率的取值范围是( )
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/4fc87f79c0824e8c84f477c019643459.png?resizew=87)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/0b3fc0c210314003a6f342f2d57e1733.png?resizew=85)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/6f2ecaa5142c444cb2aea1156300bb03.png?resizew=95)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/bbd3b3fa631148348066103207513346.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/d2315c9a6c4d4922b50c67059302cb32.png?resizew=123)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/8773d5c306b24a3e926165512861422b.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/9ffe4deccdd04122aa2f8b131d095859.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2012/7/2/1570909764321280/1570909769711616/STEM/71f9b5d3441b4178ab5f7fb441921244.png?resizew=125)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次