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> 下列运算中,正确的是()A.2x+x=3x2B.(-a2)•a3=a6C.-2x-2=-2x2D.(2m)5=2m5-数学
下列运算中,正确的是()A.2x+x=3x2B.(-a2)•a3=a6C.-2x-2=-2x2D.(2m)5=2m5-数学
题目简介
下列运算中,正确的是()A.2x+x=3x2B.(-a2)•a3=a6C.-2x-2=-2x2D.(2m)5=2m5-数学
题目详情
下列运算中,正确的是( )
A.2x+x=3x
2
B.(-a
2
)•a
3
=a
6
C.
-2
x
-2
=-
2
x
2
D.(2m)
5
=2m
5
题型:单选题
难度:中档
来源:不详
答案
A、2x、x不是同类项不能合并,故此选项错误;
B、(-a2)•a3=a5,故此选项错误;
C、-2x-2=-2×
class="stub"1
x
2
=-
class="stub"2
x
2
,故此选项正确;
D、(2m)5=32m5,故此选项错误;
故选:C.
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题目简介
下列运算中,正确的是()A.2x+x=3x2B.(-a2)•a3=a6C.-2x-2=-2x2D.(2m)5=2m5-数学
题目详情
答案
B、(-a2)•a3=a5,故此选项错误;
C、-2x-2=-2×
D、(2m)5=32m5,故此选项错误;
故选:C.