a) -2 ≤ x ≤ 3 ____[__________________]_________________
-2 3
b) 2 < x ≤ 6 ________]_________________]_________
2 6
-2 ≤ x < 1 _________[__________________[____ [-2;1[
-2 1
0 < x < 4 _____]_______________[___________ ]0;4[
0 4
x ≥ 2 [2 ; +∞[
x > 1 __________]_____________________ ]1; +∞[
1
x ≤ 2 ____________[____________________ [2; +∞[
2
-3 ≤ x < 2 ou 5 ≤ x ≤ 6 [-3;2[ U [5;6]
_______]______]__[__________[______ ]-2:0] U [1;4[
-2 0 1 4
-1 ≤ x ≤ 1 ou x ≥ 2 ____[________]_____[_________________
-1 1 2
_____________[________________[___________________
]-∞ ; -2[ U [3 ; +∞[
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a) -2 ≤ x ≤ 3 ____[__________________]_________________
-2 3
b) 2 < x ≤ 6 ________]_________________]_________
2 6
-2 ≤ x < 1 _________[__________________[____ [-2;1[
-2 1
0 < x < 4 _____]_______________[___________ ]0;4[
0 4
x ≥ 2 [2 ; +∞[
x > 1 __________]_____________________ ]1; +∞[
1
x ≤ 2 ____________[____________________ [2; +∞[
2
-3 ≤ x < 2 ou 5 ≤ x ≤ 6 [-3;2[ U [5;6]
_______]______]__[__________[______ ]-2:0] U [1;4[
-2 0 1 4
-1 ≤ x ≤ 1 ou x ≥ 2 ____[________]_____[_________________
-1 1 2
_____________[________________[___________________
-2 3
]-∞ ; -2[ U [3 ; +∞[