名校
解题方法
1 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f29f2b872f28a10371e74568985d2b.png)
(1)若函数
的图象的一条切线为直线
,求
的值;
(2)是否存在实数
,使得只有唯一的正整数
,对于
恒有
?若存在,求出
的取值范围及正整数
的值,若不存在,请说明理由?(下表的近似值仅供参考)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f29f2b872f28a10371e74568985d2b.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406c40dca4870beab58eb0a0dfe07c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f035dc9d3082ca528d9bdc46ed8d632a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a969b73396811a463999a3401040f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
2.7 | 0.69 | 1.1 | 1.39 | 1.61 | 1.79 | 1.95 | 2.08 | 2.2 |
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