已知丨Z1-1丨=2且arg(Z-1)=4/3π,求Z
问题描述:
已知丨Z1-1丨=2且arg(Z-1)=4/3π,求Z
答
设:z=a+bi,则:z-1=(a-1)+bi得:|z-1|=√[(a-1)²+b²]=2即:(a-1)²+b²=2 -------------------------(1)又:arg(z-1)=arg[(a-1)+bi]=3π/4,则:(a-1)/b=-1,代入(1),得:(-b)²...