已知函数
.
(1)若
,求
的单调区间;
(2)若函数
有两个极值点
且
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abc488cf2e78481f05e5a1845943c44.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d318d706ca4ec954246a292293b91a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea9b56ac132d710603c1af8bf78e706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2022-07-15 14:00:01
|
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解答题-问答题
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较难
(0.4)
【推荐1】已知函数
,其中
为实数,
为自然对数的底数.
(1)求函数
的单调区间;
(2)是否存在实数
,使得对任意给定的
,在区间
上总存在三个不同的
,使得
成立?若存在,求出实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f94e75d47951cb93b9e7c17cfe77597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a793b79742c7adfd59a562bc965a1394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5517d09baa4cff8a805eba40c24c49bb.png)
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名校
【推荐2】已知函数
,
.
(1)当
时,求
在
处的切线方程;
(2)求
的单调区间:
(3)若
,
,使得
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d4ffe83140243af103c4d806e3ed1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ef7094c6c60a57532334ee3e8b4afe.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da60d3fead7b237c07e817a3801cafe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41f25aab93b2ceb283fca684e9b8d4b.png)
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【推荐1】已知函数
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(1)讨论函数
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(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ecb2a8366947ce3a27940d7524e50a.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e619268403c1373e634864689d7b37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6755d43f8027568b1966520fcc7cc75.png)
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(3)当
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【推荐2】设
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(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cc2650e45ac8130d66265911588547.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c0d3f66ed3bbf32bba93e09c968b30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71fb5c4993de0af4427ce5b07fecbfce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知函数
,
.
(1)当
时,求
在
处的切线方程;
(2)若
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有且仅有一个零点,求实数
的值;
(3)在(2)的条件下,若
时,
恒成立,求实数
的取值范围.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32aecb09327ecc5d19903bcafd656803.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf5f54ecf04461c5d9bf5e892fe5e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aecb3e0e056d5953fe58f5fb02f637c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知函数
,
(其中
为自然对数的底数)
(1)求函数
的单调区间和极值;
(2)是否存在实数
,使曲线
在点
处的切线与
轴垂直?若存在,求出
的值;若不存在,请说明理由;
(3)若实数
,
满足
,
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.
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(2)是否存在实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(3)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30392f451e7c6f2b81ea3990670f900.png)
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解题方法
【推荐3】已知函数
,
.
(1)若
,求函数
的最小值及取得最小值时的
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(2)若函数
对
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0ff7ac083b888d0055e49bf130a6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc79bbf9c20ff70c4a152c6f7f026fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
您最近一年使用:0次