已知函数
(
为自然对数的底,
,
为常数且
)
(1)当
时,讨论函数
在区间
上的单调性;
(2)当
时,若对任意的
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365f8a11667dd9150cd4b80c629c1d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469a1e3190b5b0d4d11aabcb4609da09.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56cbb73ae49a61641b9d9ef65e443922.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189730bce62734abf57f76454e1b70e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46c5f0a56da9951e46b634db42dfffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3b621694ea855745959e451ab8d84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2019-05-09 15:10:22
|
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(3)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
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真题
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【推荐1】已知函数
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(1)讨论
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(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e6593580e82168f37be2da7f7f46f2.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8424a220dec8acc06bfc0e351b2378.png)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
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