解题方法
1 . 已知椭圆
的左、右焦点分别为
,抛物线
以
为焦点,过
的直线
交抛物线
于
两点,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
A.若![]() ![]() | B.当![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() | D.![]() |
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解题方法
2 . 以
表示数集
中最大(小)的数.设
,已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b09a461c487b39c41cff456cfedf744.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d660c6f3af62c625f87645d15a069198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fed98a219097783e0ca2f41483cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3385802ec776d5782adc6bfb0807246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b09a461c487b39c41cff456cfedf744.png)
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