解题方法
1 . 判断正误(正确的写“正确”,错误的写“错误”)
(1)若两个正数的和为定值,则它们的积有最大值.( )
(2)x∈R,则
的最小值是2.( )
(3)若x>0,则函数
的最小值等于
.( )
(4)已知函数
存在最大值,若不等式
恒成立,则
.( )
(1)若两个正数的和为定值,则它们的积有最大值.
(2)x∈R,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60c0b7c58c3c45581dbca3e6dca34f1.png)
(3)若x>0,则函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01798070ecd1c824b0a8b8566625606e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143aca2ea7b880e70eb3ecaedc5f9c50.png)
(4)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb1fa6b43e76575833ff732190cda49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e6b93427826fcbb48f8cdfc54fcb17.png)
您最近一年使用:0次
解题方法
2 . 判断正误(正确的填“正确”,错误的填“错误”)
(1)对任意
,
均成立.( )
(2)若
,则
.( )
(3)
异号时,
.( )
(4)当
时,
的最小值为2.( )
(1)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcce6eb3b38322059b6051ce600ee8b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dfa55731858aaed472d94ba55af2cc4.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37006891004d02050e7c57db20af3981.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f40c24c64bbb0645fcf585f4e66872.png)
您最近一年使用:0次