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若复数的值为( )
A.1+ B.-1+ C.1- D.-1-
(2009山东卷理)集合,,若,则的值为( )
A.0 B.1 C.2 D.4
(
[
A
B
C
D
若复数的值为
A.―1 B.―i C.1 D.i