复数z满足(z-i)(2-i)=5 .那么z=?
问题描述:
复数z满足(z-i)(2-i)=5 .那么z=?
答
(z-i)(2-i)=5
z-i=5/(2-i)
=5(2+i)/(2-i)(2+i)
=5(2+i)/5
=2+i
z=2+2i