23-24高一上·江苏·课后作业
1 . (1)对对数函数
(
),当
越来越小时,其图象与_____ 的负半轴越来越靠近;对对数函数
(
),当
越来越小时,其图象与_____ 的正半轴越来越靠近.
(2)对于对数函数
的图象,在第一象限内,当
时,底数越大,图象越_____ ;当
时,底数越小,图象越_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)对于对数函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ad83d265323cf71db50956e0eb39ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
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21-22高一·全国·课后作业
2 . 判断正误
(1)对数函数的定义域为R.( )
(2)
与
都不是对数函数.( )
(3)对数函数的图象一定在y轴右侧.( )
(1)对数函数的定义域为R.
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e3b66275361ad50fb8728f0bc28584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf605ad3d204601efb0421d693d3708.png)
(3)对数函数的图象一定在y轴右侧.
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