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> 函数y=+中自变量x的取值范围是()A.x≤2B.x=1C.x<2且x≠1D.x≤2且x≠1-九年级数学
函数y=+中自变量x的取值范围是()A.x≤2B.x=1C.x<2且x≠1D.x≤2且x≠1-九年级数学
题目简介
函数y=+中自变量x的取值范围是()A.x≤2B.x=1C.x<2且x≠1D.x≤2且x≠1-九年级数学
题目详情
函数y=
+
中自变量x的取值范围是 ( )
A.x≤2
B.x=1
C.x<2且x≠1
D.x≤2且x≠1
题型:单选题
难度:偏易
来源:不详
答案
D
本题考查求函数定义域。
点拨:自变量x的取值范围是是要使得函数解析式有意义。
解答:要使函数解析式有意义,需满足:
即
。
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题目简介
函数y=+中自变量x的取值范围是()A.x≤2B.x=1C.x<2且x≠1D.x≤2且x≠1-九年级数学
题目详情
答案
点拨:自变量x的取值范围是是要使得函数解析式有意义。
解答:要使函数解析式有意义,需满足:
即