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Sagot :

VINS

bonjour

f (x) = - 3 x + 7

f (8) = - 24 + 7 = - 17

f (0) =  7

- 3 x + 7 = 2

- 3 x = 2 - 7

- 3 x = - 5

x = 5/3

antécédent  = 5/3

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