名校
1 . 已知函数
.
(1)若
,讨论函数
的单调性;
(2)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46450f48c507ed4b6832e9ebb1c615a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ac6da6f335455c52c75ddda3b3e3d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6d821509a843f510d19d8cd04b151a.png)
您最近一年使用:0次
2019-08-20更新
|
496次组卷
|
3卷引用:新疆实验中学2018-2019学年高二上学期期末考试数学(文)试题
解题方法
2 . 已知函数
,
为
的导函数.
(Ⅰ)试讨论
的单调性;
(Ⅱ)若
有唯一极值点,且对
时,有
满足
.求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561cfa647e6fa01a322d0841f4208f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅰ)试讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed62c6138ddc36d9fa9529ee3a2e2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31cdc61764eef3fbe2dc5fafaa2efb39.png)
您最近一年使用:0次
3 . 已知函数f(x)=ex+
(其中e是自然对数的底数).
(Ⅰ)当t=0时,求f(x)的最值;
(Ⅱ)若t≠0时,f(x)在(
)上的最小值为1,求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c237cf93986593b70e7de9eeddf5c93.png)
(Ⅰ)当t=0时,求f(x)的最值;
(Ⅱ)若t≠0时,f(x)在(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbaf4dd2558d2c610b094507e8105ff.png)
您最近一年使用:0次
4 . 已知函数
.
(1)求函数
的最小值;
(2)当
时,记函数
的所有单调递增区间的长度为
,所有单调递减区间的长度为
,证明:
.(注:区间长度指该区间在
轴上所占位置的长度,与区间的开闭无关.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b2219ffc8da5953f1014fadf44bbd7.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a82004c290af2d142b7f463b5c8885.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0914f7548d81049cc97cca1d5d9436b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b42d1bf2bf13ff5b33b434e2340efa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2019-09-12更新
|
316次组卷
|
2卷引用:新疆乌鲁木齐市第四十中学2024届高三上学期10月月考数学试题
5 . 已知函数
.
(1)若曲线
在点
处的切线与直线
平行,求
的值;
(2)是否存在
使得
仅有一个极值点?若存在求出
的取值范围,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001fc9b77ffe162d613165c21f2a5fcf.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88c3ffdaf116318bea4218c8d6c8618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5b49f7ae023d75c6ca5c8d1ee7847b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次