已知(1+2i).z=4+3i,求z及z/.z.
问题描述:
已知(1+2i)
=4+3i,求z及. z
. z
. z
答
∵(1+2i)
=4+3i,. z
∴
=. z
=4+3i 1+2i
=(4+3i)(1−2i) (1+2i)(1−2i)
=2−i,10−5i 5
则z=2+i.
=z
. z
=2+i 2−i
=(2+i)2
(2+i)(2−i)
=3+4i 5
+3 5
i.4 5