问题
解答题
把复数z的共轭复数记作
|
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 . z
=2+i 2-i
=(2+i)(2+i) (2-i)(2+i)
=4-1+4i 5
+3 5
i.4 5
把复数z的共轭复数记作
|
∵(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 . z
=2+i 2-i
=(2+i)(2+i) (2-i)(2+i)
=4-1+4i 5
+3 5
i.4 5