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Sagot :

VINS

bonjour

f ( 2) = 3 et  f( 7) = - 7

( - 7 - 3 ) / ( 7 - 2 ) = - 10 /5 = - 2

ax = - 2 x

f (2) = 3

2 * -2 + b = 3

b = 3 + 4 = 7

f (x) = - 2 x + 7

f ( 7) = - 14 + 7 = - 7

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