问题
选择题
设复数z满足i•z=2-i,则z=( )
A.-1+2i
B.1-2i
C.1+2i
D.-1-2i
答案
∵复数z满足i•z=2-i,
∴z=
=2-i i
= -1-2i-i(2-i) i(-i)
故选D.
设复数z满足i•z=2-i,则z=( )
A.-1+2i
B.1-2i
C.1+2i
D.-1-2i
∵复数z满足i•z=2-i,
∴z=
=2-i i
= -1-2i-i(2-i) i(-i)
故选D.