Răspuns :
<= : mai mic sau egal
|x+1| <= 4
-4 <= x+1<= 4 | -1
-5 <= x <= 3
deci x ∈ [-5;3]
|x+1| <= 4
-4 <= x+1<= 4 | -1
-5 <= x <= 3
deci x ∈ [-5;3]
[tex]|x+1| \leq 4 \\ x+1 \leq 4 \\ x \leq 4-1 \\ x \leq 3 \\ x+1 \leq -4 \\ x \leq -4-1 \\ x \leq -5 \\ x \in [-5,3][/tex]