f(x)=x|x-1|+2x>2,当x-1>0即x>1时:x(x-1)+2x>2=>x^2+x-2>0=>x>1或x<-2(舍去); 当x-1<0即x<1时:x(1-x)+2x>2=>x^2-3x+2<0=> 11