如题所述
1≤|2-x|
|x-2|≥1
x-2≤-1 or x-2≥1
x≤1 or x≥3 (1)
|2-x|<3
|x-2| <3
-2<x-2<3
0<x<5 (2)
1≤|2-x|<3
(1) and (2)
"x≤1 or x≥3" and 0<x<5
0<x≤1 or 3≤x<5