设复数z满足z(1-i)=2,则|z|=?

2025-06-20 16:35:36
推荐回答(1个)
回答1:

z=x+yi
z(1-i) =2
(x+yi)(1-i)= 2
x+y +(-x+y)i =2
x+y =2 and -x+y =0
x=y=1
z=1+i
|z| =√2
ans :B