1 . 已知函数
.
(1)讨论
在
上的单调性;
(2)若函数
有两个极值点
,
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7455d9ef12f06a4f2d1676c433ccb70.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed2f490aac02631c2ed9e6b76354a49.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e111595ac59e1fb558b6a465a02829.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/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2644d21521ebf09edcd8ec438202610.png)
您最近一年使用:0次
2 . 已知函数
.
(1)讨论函数
的单调性;
(2)当
时,若函数
的两个零点分别为
,
(
),证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8248cbdc5d565662d15acb8f2be6d03.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6202c03963a598c53edee5740412ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.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/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339883bc7b850401cfadc2da15034707.png)
您最近一年使用:0次
3 . 已知函数
.
(1)若曲线
在
处的切线过原点,求实数
的值;
(2)若
,证明当
时,
.
参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7d14c21acd67348d1e2d6d5d8e974a.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfa8bf45e6d2d25a730a793d0cf5694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b15c5557add0fefe6adb90ea625668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dedd3b54c2e3a02955758893b96f0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea494dec44aa79810e80c85ca916a20.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d412610a6d71a0aad3a6b75eebad2f.png)
您最近一年使用:0次