- 设复数z满足(1-i)z=2i,则z=( )A.-1+iB.-1-iC.1+iD.1-i
- 复数2+3i(i是虚数单位)的模是______.
- 若复数Z满足(Z-i)i=2+i(i为虚数单位),则Z等于( )A.-1-IB.1-iC.-1+3iD.1-2i
- 已知复数z=1+2i(i是虚数单位),则|z|=______.
- 1+2i(1-i)2=( )A.-1-12iB.-1+12iC.1+12iD.1-12i
- 若复数z满足(3-4i)z=|4+3i|( )A.-4B.-45C.4D.45
- 若复数z=a2-1+(a-1)i(i为虚数单位)为纯虚数,则实数a______.
- 复数z满足z•(1+i)=2i,则|z|等于( )A.1B.2C.2D.3
- 已知z是纯虚数,z+21-i是实数,那么z虚部等于( )A.2iB.-2iC.2D.-2
- 若复数z1,z2满足z1=.z2,则z1,z2在复数平面上对应的点Z1,Z2( )A.关于x轴对称B.关于y轴对称C.关于原点对称D.关于直线...
- 复数(3+i1-i)2=( )A.-3-4iB.-3+4iC.3-4iD.3+4i
- 复数(2 i1-i)2(其中i为虚数单位)的虚部等于( )A.-iB.-1C.1D.0
- 复数1-3ii3的共轭复数是( )A.-3+iB.-3-iC.3+iD.3-i
- 若复数z满足iz=-1+3i,其中i是虚数单位,则|z|=______.
- 已知i是虚数单位,则复数-2+i1+i=( )A.12+32iB.-12+32iC.-12-32iD.12-32i