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> 下列各式中,正确的是()A.(13)3=27B.a3×a2=a5C.(-2a3)-3=6a-9D.a2+a3=a5-数学
下列各式中,正确的是()A.(13)3=27B.a3×a2=a5C.(-2a3)-3=6a-9D.a2+a3=a5-数学
题目简介
下列各式中,正确的是()A.(13)3=27B.a3×a2=a5C.(-2a3)-3=6a-9D.a2+a3=a5-数学
题目详情
下列各式中,正确的是( )
A.(
1
3
)
3
=27
B.a
3
×a
2
=a
5
C.(-2a
3
)
-3
=6a
-9
D.a
2
+a
3
=a
5
题型:单选题
难度:偏易
来源:不详
答案
A、(
class="stub"1
3
)3=
class="stub"1
27
≠27,故本选项错误,
B、a3×a2=a5,故选项正确,
C、(-2a3)-3=
-
class="stub"1
8
a-9≠6a-9,故本选项错误,
D、a2+a3≠a5,故本选项错误,
故选B.
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题目简介
下列各式中,正确的是()A.(13)3=27B.a3×a2=a5C.(-2a3)-3=6a-9D.a2+a3=a5-数学
题目详情
答案
B、a3×a2=a5,故选项正确,
C、(-2a3)-3=-
D、a2+a3≠a5,故本选项错误,
故选B.