解题方法
1 . 设焦距相同的椭圆
和双曲线
相交于分别位于第一象限、第二象限的
两点,两圆锥曲线的公共左焦点为
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f036026cd92e9ad059c3f22a7658638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5117e82062dc63c4fb6c60a1673615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f446378529ca555617bb248055cf97.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 设椭圆
的左、右焦点为
,椭圆上一点
和平面一点
满足
,则
的最大值与最小值之和是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78f1a9cc4dedc05c175ab99b288b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ea91dcba7707db9a70cac100779f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef1d66e3bc2f3f0e57af70196ba34b2.png)
A.48 | B.50 | C.52 | D.54 |
您最近一年使用:0次