解题方法
1 . 设有下列命题:
①当
,
时,不等式
恒成立;
②函数
在
上的最小值为2;
③函数
在
上的最大值为
;
④若
,
,且
,则
的最小值为
.
其中真命题为________________ .(填写所有真命题的序号)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5404dbefe5437f750f1aa9d6726805eb.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585dcceddb1b3d07043f5ce8870f1ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46329985180a3060098f8fb631572afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731bdc8d2686a05f12a2ba8a7e3b01be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6968d5527e13cd8cf905bfb2e2c5687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4866952e987ff2e28c19861773a10327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16edecab3862a10bc9480543c34478a9.png)
其中真命题为
您最近一年使用:0次
2021-02-02更新
|
398次组卷
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4卷引用:河南省鹤壁市2020-2021学年高二上学期期末数学理科试题