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Sagot :

Exercice 2 :

1) Par lecture graphique :

g(-7) = 2

g(-6) = 1

g(1) = 4

g(4) = 3

2)

[tex] \frac{g(2) - g(1)}{2 - 1} = \frac{5 - 4}{1} = 1[/tex]

[tex] \frac{g(9) - g(7)}{9 - 7} = \frac{1 - ( - 2)}{2} = \frac{3}{2} [/tex]

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