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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

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