Question

| x-1| ≤ 2 cum se rezolva???

Answer 1

|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]

Answer 2

l2xl=1

2x=1
x=1:2
x=0,5

2x=-1
x=-1:2
x=-0,5


S={-0,5/0,5}