已知函数
,
.
(1)当
时,求曲线
在点
处的切线方程;
(2)当
时,求证:
在
上为增函数;
(3)若
在区间
上有且只有一个极值点,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/d91a5be9a83948cfa622e607964d9e2b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/892890cf091a4665a61733f322f9dc09.png)
(1)当
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/b1aa970af10c47f3badeaa3a7c9cb164.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/222ae947ccc640fdb2ab132ff29f8556.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/945d2c8987f64e7192d32ccd20c8576c.png)
(2)当
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/b6228f0395ee4c0099f7621ced8bd28e.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/10bd750131624df6b6e4201b69519f5a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/19d920f8af534a8b83fb2a67a34d4e69.png)
(3)若
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/10bd750131624df6b6e4201b69519f5a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/889e5b0dbe7a4942ada522b6b78117a8.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/19a6ae18860c4e908fa00614f78b5618.png)
更新时间:2016-12-04 01:56:47
|
【知识点】 导数在函数中的其他应用
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】设函数
的定义域为开区间
,若存在
,使得
在
处的切线
与
的图像只有唯一的公共点,则称
为“
函数”,切线
为一条“
切线”.
(1)判断
是否是函数
的一条“
切线”,并说明理由;
(2)设
,求证:
存在无穷多条“
切线”;
(3)设
,求证:对任意实数
和正数
都是“
函数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b359345c5afa1739bf5ebf8982e1d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db192285632d1991b4ee7a003a52205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ad897d007c199e04a15aecaaaa07cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd631b7845c191e3ef6aa99fa911c9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0838b53ce004f1c2fbd46e62253f54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知函数
.
(1)讨论
的单调性;
(2)若对任意
且
,有
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660057c36ae322a8fa002e2a49261223.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd8a8d868d6aaeb832fae76080e2609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d9712c3b25f3030e166e136d3a4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302734b812452983b0faf2145655e60e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次