若复数z满足iz=2+4i,则在复平面内,z对应的点的坐标是( ) A.(2,4) B.(2,-4) C.(4,-2) D.(4,2)
问题描述:
若复数z满足iz=2+4i,则在复平面内,z对应的点的坐标是( )
A. (2,4)
B. (2,-4)
C. (4,-2)
D. (4,2)
答
复数z满足iz=2+4i,则有z=
=2+4i i
=4-2i,(2+4i)i −1
故在复平面内,z对应的点的坐标是(4,-2),
故选C.