记
,其中
为函数
的导数
若对于
,
,则称函数
为D上的凸函数.
求证:函数
是定义域上的凸函数;
已知函数
,
为
上的凸函数.
求实数a的取值范围;
求函数
,
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ffc277579c3a2bc7b4aebb114de073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2437d40a85a950a06b1824312ddfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afb374f76f168ea20dfd17797a921f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00d55717c75d3185f89e56c9b322e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7028a5fa4d781d382ca3b73b74796e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4f74179a623393c3804e573955c667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f575c52f4160cab612b6b0ba1781df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980a8c4eb822aeb591ceacfe8a7aaa11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead849c0dc4a82285808a7e081ad75c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876959b9f90f2379cf3d0927a8e31005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9efc1af4717d3df7e60366262305ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae1d01d5e075f5d2395eec77c4a4822.png)
更新时间:2019-03-18 15:11:18
|
【知识点】 函数单调性、极值与最值的综合应用
相似题推荐
解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知函数
.
(1)设
,求函数
的单调增区间;
(2)设
,求证:存在唯一的
,使得函数
的图象在点
处的切线l与函数
的图象也相切;
(3)求证:对任意给定的正数a,总存在正数x,使得不等式
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0ce54523808b26028ac97c9c461fce.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f1f957a1b5a1d0cea742a3735cccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f702bfe1a376398286f1dc3daf8c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b27662c6958b9653cf4a7d740b65835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(3)求证:对任意给定的正数a,总存在正数x,使得不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103585ff209f8434e4de3352d384d35d.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】已知函数
.
(1)求证:
的导函数
在
上存在一零点;
(2)求证:
有且仅有两个不同的零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9ef475c081744e952636b9a4a78e3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71163f419555f2ed76075c8ff659fbfc.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次