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4.1
Exercice 1
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4.2
Exercice 2
:1
4.3
Exercice 3
:1
4.4
Exercice 4
:1
4.5
Exercice 5
:1
4.6
Exercice 6
:1
4.7
Exercice 7
:1
4.8
Exercice 8
:1
4.9
Exercice 9
:1
4.10
Exercice 10
:1
4.11
Exercice 11
:1
4.12
Exercice 12
:1
4.13
Exercice 13
:1
4.14
Exercice 14
:1
4.15
Exercice 15