问题
填空题
已知z是复数,i是虚数单位,若(1-i)z=2i,则z=______.
答案
∵(1-i)z=2i,∴z=
=2i 1-i
=2i(1+i) (1-i)(1+i)
=-1+i,-2+2i 2
故答案为:-1+i.
已知z是复数,i是虚数单位,若(1-i)z=2i,则z=______.
∵(1-i)z=2i,∴z=
=2i 1-i
=2i(1+i) (1-i)(1+i)
=-1+i,-2+2i 2
故答案为:-1+i.