已知复数z满足:|z|=1+3i-z,求(1+i)2(3+4i)2z的值.
问题描述:
已知复数z满足:|z|=1+3i-z,求
的值.
(1+i)2(3+4i) 2z
答
设z=a+bi(a,b∈R),
而|z|=1+3i-z,即
−1−3i+a+bi=0,
a2+b2
则
,解得
+a−1=0
a2+b2
b−3=0
,
a=−4 b=3
z=-4+3i,
∴
=
(1+i)2(3+4i) 2z
=(1+i)2(3+4i) 2(−4+3i)
=1.(3i+4i2) −4+3i