2010 Guangdong Question 2 Single-choice Differentiating 2010_广东卷 (数学) 2.若复数$z1=1+i$,$z2=3-i$,则z1·$z2=$ A. 4B. 2+ iC. 2+2 iD. 3 Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →