职专数学

来源：百度知道 编辑：UC知道 时间：2024/06/29 01:25:57
1.|x-3|>5 2. |2x+5|>=1 3. |2x+5|>=1 4. |5x-6|<4 5. |x-1|>=1/2 6.|x+1|<=1/3 7. |3-2x|>1 8.|4-3x|<2

1.|x-3|>5
=>x-3>5, x-3<-5
=>x>8, x<-2

2. |2x+5|>=1
=>2x+5>=1, 2x+5<=-1
=>x>=-2, x<=-3

3. |2x+5|>=1
=>2x+5>=1, 2x+5<=-1
=>x>=-2, x<=-3

4. |5x-6|<4
=>-4<5x-6<4
=>2<5x<10
=>2/5<x<2

5. |x-1|>=1/2
=>x-1>=1/2,x-1<=-1/2
=>x>=3/2, x<=1/2

6.|x+1|<=1/3
=>-1/3<=x+1<=1/3
=>-4/3<=x<=-2/3

7. |3-2x|>1
=>3-2x>1,3-2x<-1
=>x<1, x>2

8.|4-3x|<2
=>-2<4-3x<2
=>-6<-3x<-2
=>2/3<x<2

1.x>8或x<-2
2。x>=-2或x<=-3
3。x>=-2或x<=-3
4。2/5<x<2
5。x>=3/2或x<=1/2
6。-4/3<=x<=-2/3
7。x>2或x<1
8。2/3<x<2