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> 下列说法错误的是:()A.-1的立方根是-1B.1的平方根是1C.是2的算术平方根D.9的平方根是±3-八年级数学
下列说法错误的是:()A.-1的立方根是-1B.1的平方根是1C.是2的算术平方根D.9的平方根是±3-八年级数学
题目简介
下列说法错误的是:()A.-1的立方根是-1B.1的平方根是1C.是2的算术平方根D.9的平方根是±3-八年级数学
题目详情
下列说法错误的是:( )
A. -1的立方根是-1
B.1的平方根是1
C.
是2的算术平方根
D.9的平方根是±3
题型:单选题
难度:中档
来源:不详
答案
B
此题主要考查了立方根、平方根的定义,注意:一个数的立方根与原数的性质符号相同;一个非负数的平方根有两个,互为相反数,正值为算术平方根.
A、-1的立方根是-1,A正确。
B、1的平方根是±1,B错误。
C、 2的平方根是±
,
是2的算术平方根,C正确。
D、9的平方根是±3,D正确。
故选B
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题目简介
下列说法错误的是:()A.-1的立方根是-1B.1的平方根是1C.是2的算术平方根D.9的平方根是±3-八年级数学
题目详情
答案
A、-1的立方根是-1,A正确。
B、1的平方根是±1,B错误。
C、 2的平方根是±
D、9的平方根是±3,D正确。
故选B