已知复数z=1-i,则z2z−1=_.
问题描述:
已知复数z=1-i,则
=______. z2 z−1
答
∵已知复数z=1-i,则:
z2 z−1
=
=(1−i) 2
1−i−1
=2,−2i −i
故答案为:2.