满足关系z(1-i)=2的复数z的共轭复数是( ) A.12+12i B.12−12i C.1-i D.1+i
问题描述:
满足关系z(1-i)=2的复数z的共轭复数是( )
A.
+1 2
i1 2
B.
−1 2
i1 2
C. 1-i
D. 1+i
答
∵z(1-i)=2,
∴z=
=2 1−i
=2(1+i) (1−i)(1+i)
=1+i,2(1+i) 2
∴
=1-i.. z
故选C.