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Sagot :

VINS

bonjour

f (3) = 2 et  f ( - 4 ) =  16

( 16 - 2 ) / ( - 4 - 3 ) =   - 14/7 = - 2 donc ax =   - 2 x

f (3) = 2

3 * - 2 + b = 2

b = 2 + 6 = 8

f (x) = - 2 x + 8

f ( -4) = - 4 * - 2 + 8 = 16

fonction affine =ax+b

f(3) =2--->3a+b=2

f(-4)=16--->-4a+b=16

par combinaison

--->-3a-b=-2

-----4a+b= 16

--->a=14/-7=-2

3a+b=2

b=2+6 =8

f(x) =-2x+8

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