名校
1 . 已知函数
,下列说法中错误的序号是__________ .
①
一定有最小值.
②当
时,
的定义域为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabc514b135b9648c91f3559364daa02.png)
③当
时,
的值域为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
④若
在区间
上单调递增,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91886a687dc2f7ea07bb61f506c443f4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabc514b135b9648c91f3559364daa02.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e0400d730672ae2110ff48786dd1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176f6d0fcc0886354e2bd82d8cb95871.png)
您最近一年使用:0次
2021-01-17更新
|
240次组卷
|
2卷引用:吉林省延边州2020-2021学年高一上学期期末考试数学试题
解题方法
2 . 判断正误(正确的写“正确”,错误的写“错误”)
(1)对数函数的图像都过定点
.( )
(2)对数函数的图像都在y轴的右侧.( )
(3)若对数函数
是减函数,则
.( )
(4)
的解集是
.( )
(1)对数函数的图像都过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
(2)对数函数的图像都在y轴的右侧.
(3)若对数函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac585e0c1f136d948300a554fa2d6b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41c6b9fa72109ba69163a5c6b7874a2.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cc8e91c8628e8fb1156bd1e5fdba07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33777028d00a6718d6a4b28977582b59.png)
您最近一年使用:0次