以3x+1=0和2x-1=0时的x值作为讨论的分界点
即以x=-1/3和x=1/2为分界点进行讨论
(1)当x>1/2时
l3x+1l+l2x-1l=3x+1+2x-1=5x
(2)当-1/3≤x≤1/2时
l3x+1l+l2x-1l=3x+1-(2x-1)=x+2
(3)当x
化简l3x+1l+l2x-1l
以3x+1=0和2x-1=0时的x值作为讨论的分界点
即以x=-1/3和x=1/2为分界点进行讨论
(1)当x>1/2时
l3x+1l+l2x-1l=3x+1+2x-1=5x
(2)当-1/3≤x≤1/2时
l3x+1l+l2x-1l=3x+1-(2x-1)=x+2
(3)当x