Răspuns :
|x-1|= 1-x ,daca x<1
x-1,daca x>1
x<1⇒
1-x≤2
-x≤2-1
-x≤1|-1
x≥-1 x∈[-1,0)
daca x>1⇒
x-1≤2
x≤3 ,x=(2,3]
s=[-1,0)U(2,3]
x-1,daca x>1
x<1⇒
1-x≤2
-x≤2-1
-x≤1|-1
x≥-1 x∈[-1,0)
daca x>1⇒
x-1≤2
x≤3 ,x=(2,3]
s=[-1,0)U(2,3]