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> (213)2+(-213)2的值是()A.0B.423C.23D.以上都不对-数学
(213)2+(-213)2的值是()A.0B.423C.23D.以上都不对-数学
题目简介
(213)2+(-213)2的值是()A.0B.423C.23D.以上都不对-数学
题目详情
(2
1
3
)
2
+
(-2
1
3
)
2
的值是( )
A.0
B.
4
2
3
C.
2
3
D.以上都不对
题型:单选题
难度:偏易
来源:不详
答案
原式=2
class="stub"1
3
+2
class="stub"1
3
=4
class="stub"2
3
.
故答案选B.
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题目简介
(213)2+(-213)2的值是()A.0B.423C.23D.以上都不对-数学
题目详情
答案
故答案选B.