化简l3x+1l+l2x-1l

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化简l3x+1l+l2x-1l化简l3x+1l+l2x-1l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

化简l3x+1l+l2x-1l
化简l3x+1l+l2x-1l

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

讨论3x+1和2x+1正负,确定x的取值范围,根据他们的正负去绝对值,化简之...

当 2x-1≥0 即:x≥1/2时
l3x+1l+l2x-1l=3x+1+2x-1=5x
当3x+1≥0且2x-1<0
即:-1/3≤x<1/2时
l3x+1l+l2x-1l=3x+1-2x+1=x-2
当3x+1<0,即x< -1/3时
l3x+1l+l2x-1l= -3x-1-2x+1= -5x

当3x+1>0,2x-1>0时x>1/2,原式=5x
当3x+1<0,2x-1<0时x<-1/3原式=-3x-1-2x+1=-5x
当3x+1<0,2x-1>0时x无解
当3x+1>0,2x-1<0时,-1/3