已知函数
,其中
为自然对数的底数.
(1)若
有极值点,求证:必有一个极值点在区间
内;
(2)求证:对任意
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980fc67bdcb458fa153c20a9309c0dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ce2f5e22175e3ff8ab5e0afca58f9c.png)
(2)求证:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93862527676ad4fcc86c905522eefa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67da105f0fe616288b630d28dd0a22aa.png)
更新时间:2018-02-23 10:23:00
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】设函数
.
(Ⅰ)当
时,求证:
;
(Ⅱ)如果
恒成立,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36b2060634e0bade7fb5efc48ffb7ea.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(Ⅱ)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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)求
的单调区间;
(2)设函数
,若
存在两个极值点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a055cc4c78d8f16f166e0691bf6db828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd84bb22e1c408b163dd488aa2e8fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa32cee22e7cbe57c74dde23c901ada6.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】已知函数
.
(1)求曲线
在点
处的切线方程;
(2)求
在
上的极值点的个数
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f438eca2954862a6a7dc020ffeb1e9a.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6064ab28b1a5aee2637625d8adb0b24.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f9cebd4f20ddb3651b634b59e815fc.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60427758af9c900f0bd646412f3c1d03.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec47cf76452e6167f06a369c5b171b7f.png)
.
(1)讨论函数
的极值点的个数;
(2)若
有两个极值点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261c0899711077922ca479c99ffe2fef.png)
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec47cf76452e6167f06a369c5b171b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30aa3954054926017cb81e5f2cd122b7.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261c0899711077922ca479c99ffe2fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9490a94eb75198d47e94a4169521326b.png)
您最近一年使用:0次