若实数m,n满足|2m-1|+(n+2)2=0,则mn的值等于( ) A.-1 B.1 C.-2 D.2
问题描述:
若实数m,n满足|2m-1|+(n+2)2=0,则mn的值等于( )
A. -1
B. 1
C. -2
D. 2
答
∵m、n满足|2m-1|+(n+2)2=0,∴2m-1=0,m=
;n+2=0,n=-2;则mn=-2×1 2
=-1.故选A.1 2