解题方法
1 . 已知函数
,则满足不等式
的
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3d532e0d26a7a19b93a3a792c2793a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6fc43fc3dcc5cbd490d325cb5ab1e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
名校
解题方法
2 . 已知
.若
存在最小值,则实数a的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2430b18c2b7cadd4415bd96f66fa7761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-10-11更新
|
1394次组卷
|
5卷引用:北京市海淀区中国人民大学附属中学2023届高三上学期10月检测练习(月考)数学试题
名校
3 . 已知函数
,其中
且
.给出下列四个结论:
①若
,则函数
的零点是
;
②若函数
无最小值,则
的取值范围为
;
③若
,则
在区间
上单调递减,在区间
上单调递增;
④若关于
的方程
恰有三个不相等的实数根
,则
的取值范围为
,且
的取值范围为
.
其中,所有正确结论的序号是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b3cb969685ffe853a26c31010c733c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc91d92eb161e54def20b039d2089201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
②若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2edd8edcb21bd41584daf9bb95a5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
④若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8ff8d31545883a5880ae40ffc4ebb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bacde908aec2c313978fc4309d82bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e0a0dde137e24c80d0afeec024f2b6.png)
其中,所有正确结论的序号是
您最近一年使用:0次
2022-03-01更新
|
639次组卷
|
5卷引用:北京市海淀区二十中学2022-2023学年高一上学期阶段性检测(12月月考)数学试题