自我小测
1.若复数z满足z+i-3=3-i,则z=__________.
2.(2012天津高考改编)i是虚数单位,复数__________.
3.设a∈R,且是实数,则a=__________.
4.已知i为虚数单位,则__________.
5.已知z1=1+2i,z2=m+(m-1)i,且两复数的乘积z1z2的实部和虚部为相等的正数,则实数m的值为__________.
6.已知复数,则z的共轭复数的虚部为__________.
7.若复数z满足z-2i=1+zi(i为虚数单位),则z=______.
8.设z1=x+2i,z2=3-yi(x,y∈R),且z1+z2=5-6i,则z1-z2=__________.
9.计算:
(1);
(2)(3+2i)+(-2)i;
(3)(1+2i)+(i+i2)+(3+4i);
(4)(6-3i)+(3+2i)-(3-4i)-(-2+i).
10.已知复数.
(1)求复数z;
(2)若z2+az+b=1-i,求实数a,b的值.