复数z=1+3i/1+i的共轭复数是…急啊!复数z=1+3i/1+i的共轭复数是A.2+i B.2-i C.1+i D.1-i

复数z=1+3i/1+i的共轭复数是…急啊!复数z=1+3i/1+i的共轭复数是A.2+i B.2-i C.1+i D.1-i
复数z=1+3i/1+i的共轭复数是…急啊!
复数z=1+3i/1+i的共轭复数是A.2+i B.2-i C.1+i D.1-i

复数z=1+3i/1+i的共轭复数是…急啊!复数z=1+3i/1+i的共轭复数是A.2+i B.2-i C.1+i D.1-i
z=(1+3i)/(1+i)
=(1+3i)(1-i)/(1²-i²)
=2+i
所以z的共轭复数为2-i
选B

答案是B吧，你再算算，我算的是B