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Sagot :

VINS

bonjour

f (x) = 3 x - 1

f ( 2) = 6 - 1 = 5

f ( - 1) =  - 3 - 1 = - 4

3 x - 1 = 2

3 x =  3

x =  1

f ( 1 ) = 2

3 x - 1 = - 1

3 x =  - 1 + 1

3 x  = 0

f (0) =  - 1

f ( 0.5) =  1.5 - 1 = 0.5

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