10-11高三·江苏·单元测试
解题方法
1 . 已知函数
.
(1)求证:函数
在点
处的切线恒过定点,并求出定点坐标;
(2)若
在区间
上恒成立,求
的取值范围;
(3)当
时,求证:在区间
上,满足
恒成立的函数
有无穷多个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbece897696948bc5081d52361e2f50.png)
(1)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86209a88158e6e388b59b9a909da3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e1c9c97de9198d47306216e9961b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51947e18ac12b186aa3c09e62c036af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e1c9c97de9198d47306216e9961b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d28d4330fd2169fbfbbac5f5a95c074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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