复数(2+2i)4(1-3i)5等于()A.1+3iB.-1+3iC.1-3iD.-1-3i-数学

题目简介

复数(2+2i)4(1-3i)5等于()A.1+3iB.-1+3iC.1-3iD.-1-3i-数学

题目详情

复数
(2+2i)4
(1-
3
i)
5
等于(  )
A.1+
3
i
B.-1+
3
i
C.1-
3
i
D.-1-
3
i
题型:单选题难度:偏易来源:不详

答案

复数
(2+2i)4
(1-
3
i)
5
=
(1+i)4
2(class="stub"1
2
-
3
2
)
5
=class="stub"-4
2(-class="stub"1
2
+
3
i
2
)
2
=2( -class="stub"1
2
+
3
2
i)
=-1+
3
i

故选B.

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