2023·河北·模拟预测
名校
解题方法
1 . 若当实数a变化时,直线
恒与定曲线
相切,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28298b8451b0e112df18e020bd128a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14673543a3ae1dc1f1d1baae2d512fe7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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