已知函数
,
(e为自然对数的底数).
(1)若函数
的最大值为0,求a的值;
(2)若对于任意正数x,
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20ff10bc4fd42a2c1aad09d3885dbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cc2a47354e79ff4fefa6969816484b.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对于任意正数x,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
2023·安徽合肥·模拟预测 查看更多[3]
更新时间:2023-05-28 15:18:51
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解答题-证明题
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名校
【推荐1】已知函数
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(Ⅰ)当
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(Ⅱ)当
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(Ⅲ)求证:
(
,
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(Ⅰ)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2188e898a6af08a1e4f4001001194bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36ebd09690ad6024b2fa0390595a39b.png)
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(Ⅲ)求证:
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【推荐2】设函数
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(1)当
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(2)若
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(3)当
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解题方法
【推荐1】已知函数
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(2)若
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【推荐2】设函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
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(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3524a611d4818f61abb210d6c598cd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863b54185da5a3f1a765e1aa0577e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
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(3)当
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![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676493770752/1572676500029440/STEM/af00e58821f448cc8a35d47cdd95825b.png)
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![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676493770752/1572676500029440/STEM/6928000a3eff40bbac43a299518dc56d.png)
(I)若对于任意的
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676493770752/1572676500029440/STEM/359a7e1acba54aed94f2a21e0d55d0a2.png)
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(II)在(Ⅰ)的条件下,若方程
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676493770752/1572676500029440/STEM/598be6170c9a44189a49921586ec280f.png)
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![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676493770752/1572676500029440/STEM/6928000a3eff40bbac43a299518dc56d.png)
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