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> 如果有意义,则的取值范围是()A.B.C.D.-八年级数学
如果有意义,则的取值范围是()A.B.C.D.-八年级数学
题目简介
如果有意义,则的取值范围是()A.B.C.D.-八年级数学
题目详情
如果
有意义,则
的取值范围是( )
A.
B.
C.
D.
题型:单选题
难度:中档
来源:不详
答案
C
分析:根据二次根式有意义的条件:被开方数大于或等于0,即可求解.
解答:解:根据题意,得
2-x≥0,解得x≤2.
故选C.
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题目简介
如果有意义,则的取值范围是()A.B.C.D.-八年级数学
题目详情
答案
解答:解:根据题意,得
2-x≥0,解得x≤2.
故选C.