bonjour
1)
|x - 2| ≤ 3 <=> -3 ≤ x - 2 ≤ 3
<=> -3 + 2 ≤ x - 2 + 2 ≤ 3 + 2
<=> -1 ≤ x ≤ 5
x ∈ [-1 ; 5]
2)
x ≤ 15 x ∈ ]-∞ ; 15]
3)
|x| ≤ 1 <=> -1 ≤ x ≤ 1
x ∈ [-1 ; 1]
4)
0 ≤ x ≤ 2 x ∈ [0 ; 2]
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bonjour
1)
|x - 2| ≤ 3 <=> -3 ≤ x - 2 ≤ 3
<=> -3 + 2 ≤ x - 2 + 2 ≤ 3 + 2
<=> -1 ≤ x ≤ 5
x ∈ [-1 ; 5]
2)
x ≤ 15 x ∈ ]-∞ ; 15]
3)
|x| ≤ 1 <=> -1 ≤ x ≤ 1
x ∈ [-1 ; 1]
4)
0 ≤ x ≤ 2 x ∈ [0 ; 2]