Question

m为何实数值时,z=(2m²-5m+2)+(3m²-4m-4)i,

(1)是实数;

(2)是纯虚数;

(3)对应的点在第四象限?

Answer 1

解:(1)由3m²-4m-4=0得m=-或m=2.??

(2)由?

(3)由