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> (2011湖南怀化,1,3分)49的平方根为A.7B.-7C.±7D.±-八年级数学
(2011湖南怀化,1,3分)49的平方根为A.7B.-7C.±7D.±-八年级数学
题目简介
(2011湖南怀化,1,3分)49的平方根为A.7B.-7C.±7D.±-八年级数学
题目详情
(2011湖南怀化,1,3分)49的平方根为
A.7
B.-7
C.±7
D.±
题型:单选题
难度:偏易
来源:不详
答案
C
∵±7的平方等于49,
∴49的平方根为±7.
故选C
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(2011江苏泰州,9,3分)16的算术平方
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题目简介
(2011湖南怀化,1,3分)49的平方根为A.7B.-7C.±7D.±-八年级数学
题目详情
答案
∴49的平方根为±7.
故选C