1≤|2x-1|＜5 1≤|2x-1|＜5当2x-1>0时,得1≤2x-1

*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 两道有关符号问题题目｜x=2｜+｜x-3｜ x+2=0 x=-2 x-3=0 x=3x＜-2-x-2-x-3=-2x=1x＞3x+2+x-3=2x-1-2≤x≤3x=2-x+3=5｜x-1｜+｜x+1｜ x-1=0 x=1 x+1=0 x=-1 x≤-1-x+1-x+1=2-2xx＞1x-1+x+1=2x-1＜x≤11-x+x+1=2两道题目都是零点 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 解不等式组2x-3＜6-x.1-4x≤5x-2 3+x≤2x-4 -5x-3＜4x-1 解不等式 解不等式2≤|2x-1|＜7 |2x-1|＜|x|+1 |5x-x²|＞6 |x+3|+|x|＜5 解下列不等式组：{x/2-1＜2/3x,4x≤1；{2x-x/2＜-3/2,x+1＞5-x/2 1.-X^2+X≥3x+12.x（x+9)≤3（x-3）3.X^2-2x＜2X^2+2解题格式一定要写好哦4.-x+1/2x+5≥05.（m-2)x＞1-m6.X^2-（a-3）X-3a＜07.X^2-(a+1/a）x+1＞0 -x≥3-2x²求解集x²≥5 -2x＜x²+4 1≤2x-x² 求这几道题解集过程 解下列不等式：1.x-2＜2（x-1),x/3≤4-x;2.2x-1＜x+1,x+8＜4x-1 解不等式组：X-3(X-1)X≤7① 1-(2-5x)/3＜x② x-(3-1)≤x+2解不等式!x-5/2+1＞x-3 3/1x-2＜1-5/1x x-(3x-1)≤x+2 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 已知函数f(x)={-x-1 (x＜-2） ,x+3 （-2≤x≤1/2) (x∈R）,5x+1 （x＞1/2）求函数f（x）的最小值 用区间法表示下列集合1 {x丨x≤5},2 .{x丨x-3},3.{x丨-1＜x＜7},4.{x丨x＞5或x＜0}, 解不等式大神1/2+2x/3≤ -x/2 +5/3 1/2(x+3)＜2 x+2/2＞x+3/3x-3(x-2)≥4 1+2x/3＞ x-1 3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5 （1）方法 2(x+1)≤3x-1 和 3分之x＜4分之x+1