名校
1 . 曲线C:
与直线l:
有4个交点,则k的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33cf8f65f88a9aa0c8515a0989b7343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231896d2386c924306fce5ccf9f9e8a7.png)
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名校
2 . 过点
作直线
与双曲线
有且仅有一个公共点,这样的直线
有________ 条.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d059a0d71bddb677c603d84fac444b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f8ae565db8a7d4b95fdd85e28afa2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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