bonjour
f (x) = 2 - 5 x a = - 5 et b = 2
f ( x) = x a = 1 et b = 0
f (x) = 7 sera toujours = 7 fonction constante
f (x) = - x /2 a = - 1/2 , b = 0
f (x) = x /3 - 1 a = 1/3 b = - 1
f ( x) = - 3 /4 - x a = - 1 , b = - 3 /4
i ( x) = 7 - 0.5 x a = - 0.5 , b = 7
