bjr
a)
12 < x < 13 ______|_____]_____[_____|___________
11 12 13 14
x ∈ ∈ ]12 ; 13[
b)
x ∈ [-2 ; 3] ____|___[___|___|___|___|___]_________
-3 -2 -1 0 1 2 3
-2 ≤ x ≤ 3
c)
-0,5 ≤ x < -0,25
d)
x < 1 _________________|____[____|__________
0 1 2
x ∈ ] -inf ; 1[
e)
3 ≤ x ______|___|___|___[___|_____________
0 1 2 3 4
x ∈ [3 ; + inf [
f)
x < 8
g)
x ≥ 5
