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Sagot :

Bonjour


F est une fonction affine f(x)=ax+b telle que f(8)-f1=14.Alors a


f(8) = 8a + b

f(1) = a + b


f(8) - f(1) = 14

8a + b - (a + b) = 14

8a - a + b - b = 14

7a = 14

a = 14/7

a = 2

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