|x-1|＋|2x－3|>=2(1)x<=1,1-x+3-2x-2>=0,x<=2/3,所以解为x<=1(2)1=0,x<=0,所以无解(3)x>=3/2,x-1+2x-3-2>=0,x>=2,所以解为x>=2所以原式解为{x<=1}∪{x>=2}
当x>1.5,f=3x-4>=2,x>2当1=2,x<=4.所以1当x<1,f=4-3x>=2,x<=2.所以x<=1
