Question

復(fù)數(shù)z=

3

2

-ai，a∈R，且z2=

1

2

-

3

2

i，則a的值為（　�。�

A．1

B．2

C． 1 2

D． 1 4

Answer 1

z=

3

2

-ai∴z2=

3

4

-a2- 

3

ai=

1

2

-

3

2

i∴a=

1

2

．
故選C．