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> 在二次根式:①;②;③;④中,与是同类二次根式的是()A.①和③B.②和③C.①和④D.③和④-八年级数学
在二次根式:①;②;③;④中,与是同类二次根式的是()A.①和③B.②和③C.①和④D.③和④-八年级数学
题目简介
在二次根式:①;②;③;④中,与是同类二次根式的是()A.①和③B.②和③C.①和④D.③和④-八年级数学
题目详情
在二次根式:①
;②
;③
;④
中,与
是同类二次根式的是( )
A.①和③
B.②和③
C.①和④
D.③和④
题型:单选题
难度:偏易
来源:不详
答案
C
先将原根式化为最简二次根式,从而根据同类二次根式的被开方数相同可得出答案
由题意得:
,
根据同类二次根式的被开方数相同可得答案为
,
与
是同类二次根式.
故答案选C.
点评:本题考查同类二次根式的知识,属于基础题,注意解答本题的关键是将原根式化为最简二次根式,掌握同类二次根式的被开方数相同.
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题目简介
在二次根式:①;②;③;④中,与是同类二次根式的是()A.①和③B.②和③C.①和④D.③和④-八年级数学
题目详情
答案
由题意得:
根据同类二次根式的被开方数相同可得答案为
故答案选C.
点评:本题考查同类二次根式的知识,属于基础题,注意解答本题的关键是将原根式化为最简二次根式,掌握同类二次根式的被开方数相同.