【题文】函数y=的定义域是 ( ).A.[-,-1)∪(1,]B.(-,-1)∪(1,)C.[-2,-1)∪(1,2]D.(-2,-1)∪(1,2)
【题文】函数y=的定义域是 ( ).A.[-,-1)∪(1,]B.(-,-1)∪(1,)C.[-2,-1)∪(1,2]D.(-2,-1)∪(1,2)
题型:难度:来源:
答案
【答案】A
解析
【解析】∵
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204442-38330.png)
?
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204443-29033.png)
?
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204443-23630.png)
?
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204443-33379.png)
?-
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204442-96375.png)
≤
x<-1或1<
x≤
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204442-96375.png)
.∴
y=
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204441-30810.png)
的定义域为[-
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204442-96375.png)
,-1)∪(1,
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204442-96375.png)
].
举一反三
【题文】函数
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204439-19134.png)
的定义域为
.
【题文】函数
f(
x)=e
xsin
x在区间
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204426-41103.png)
上的值域为 ( ).
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204426-32800.jpg)
【题文】函数
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204407-70419.png)
的定义域是( )
【题文】函数y=
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204358-51804.png)
的定义域是
【题文】函数
f(
x)=
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204349-52239.png)
+
![](http://img.shitiku.com.cn/uploads/allimg/20200324/20200324204349-88129.png)
的定义域为( ).
A.[-2,0)∪(0,2] | B.(-1,0)∪(0,2] |
C.[-2,2] | D.(-1,2] |
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