1考点27数系的扩充与复数的引入1.i为虚数单位,则复数432ii()A.11255iB.11255iC.11255iD.11255i2.在复平面内,已知复数z对应的点与复数1i对应的点关于实轴对称,则zi()A.1iB.1iC.1iD.1i3.已知复数z满足(12)43izi,则z的虚部是()A.-1B.iC.1D.i4.复数1,ziz为z的共轭复数,则2zzi()A.2iB.22iC.4iD.4i5.已知11aibii(),abR,其中i为虚数单位,则ab()A.0B.1C.-1D.26.已知,abR,2aiibi,则abi的共轭复数为A.2iB.2iC.2iD.2i7.已知复数1221izizi,则z()A.22B.52C.2D.58.若5312imnii,其中,mnR,则mn()A.145B.125C.125D.1459.设i是虚数单位,若复数12zi,则复数z的模为()A.1B.22C.3D.510.已知20191zi,则2zi()A.10B.22C.2D.211.复数z满足113zii,则复数z等于()2A.1iB.1iC.2D.-212.设351izii,则z()A.2B.12C.22D.10213.已知复数z满足2zzii(i为虚数单位),则z()A.5B.2C.102D.114.已知复数z满足2(1)26zii(i为虚数单位),则z为()A.10B.13C.10D.1315.已知复数(i)(1i)za(i为虚数单位)在复平面内对应的点在直线2yx上,则实数a的值为()A.0B.1C.1D.1316.已知i为虚数单位,则复数3(1)izii的虚部为()A.1B.2C.1D.217.已知复数34zi,则zz()A.3455iB.3455iC.1iD.1i18.已知i是实数集,复数z满足3zzii,则复数z的共轭..复数为()A.12i+B.12i-C.2iD.2i19.已知i为虚数单位,复数z满足121iiz,则z()A.1B.3C.5D.520.已知复数1izi,则22z在复平面内对应的点位于()A.第一象限B.第二象限C.第三象限D.第四象限21.已知复数312izi,则复数z的实部为()3A.25B.25iC.15D.15i22.已知复数z满足32izi(i是虚数单位),则z=()A.23iB.23iC. 23iD. 23i23.已知31izi(其中i为虚数单位),则z的虚部为()A.iB.1C.1D.224.i是虚数单位,若21aii是纯虚数,则实数a的值为_________.25.已知i是虚数单位,复数z满足3ii4iz,则复数z的实部为_____.26.20191i1i=_________.