问题
填空题
设z∈C,且(1+2i)
|
答案
∵(1+2i)
=4+3i,∴. z
=. z
=4+3i 1+2i
=(4+3i)(1-2i) (1+2i)(1-2i)
=2-i,10-5i 5
∴z=2+i,|z|=
.5
故答案为 2+i,5
设z∈C,且(1+2i)
|
∵(1+2i)
=4+3i,∴. z
=. z
=4+3i 1+2i
=(4+3i)(1-2i) (1+2i)(1-2i)
=2-i,10-5i 5
∴z=2+i,|z|=
.5
故答案为 2+i,5