已知(1+2i).z=4+3i,求z及z/.z.

问题描述:

已知(1+2i)

.
z
=4+3i,求z及
z
.
z

∵(1+2i)

.
z
=4+3i,
.
z
4+3i
1+2i
(4+3i)(1−2i)
(1+2i)(1−2i)
10−5i
5
=2−i

则z=2+i.
z
.
z
2+i
2−i
(2+i)2
(2+i)(2−i)
3+4i
5
3
5
+
4
5
i