解:2x+1=0得x=-1/2 x-1=0得x=1∴(1)x<-1/2时,-2x-1+2x-2>0,得-3>0,不存在(2)-1/2≤x≤1时,2x+1+2x-2>0,得x>1/4,则1/4(3)x>1时,2x+1-2x+2>0,得3>0,则x>1∴综上,x>1/4