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
化简l3x+1l+l2x-1l
不等式l2x+1l+lx+al+l3x-3l
解不等式 l2x+1l+l3x-2l≥5
l2x+3l-l3x-1l大於等於0 解?
求y=lx-1l+l2x-1l+l3x-1l.+l2011x-1l的最小值
l2x-1l-x
l2x-1l
解不等式l2x-1l
不等式1≤l2x-1l
lx-1l+lx-7l+l2x-1l+l2x-3l+l-x+2l的最小值
(1)(l3X一1l一1)(SinX一2>0.(2),l2X一1l<2m一1(m属于R).谢
解不等式:(1) lx-2l+l2x-1l
lx-3l大於等於l2x+1l
lx+1l+l2x-3l+2>0
解不等式l2x+1l+|x-2l>4
f(x)= l2x+1l - lx-4l
不等式l3x-1l<1的解集
解不等式(l3x-1l)(sinx-1/2)>0