复数4+3i/1+2i的实部是_.

问题描述:

复数

4+3i
1+2i
的实部是______.

4+3i
1+2i
=
(4+3i)(1−2i)
(1+2i)(1−2i)
=
10−5i
5
=2-i.
实部为2
故答案为:2