Réponse :
bonsoir
f (x) = - 3 x + 2
f ( - 2 ) = 6 + 2 = 8
- 3 x + 2 = - 22
- 3 x = - 22 - 2
- 3 x = - 24
x = 8
f ( 4 ) = - 12 + 2 = - 10
- 3 x + 2 = - 34
- 3 x = - 36
x = 12
f (12 ) = - 34
P1 (x) = 8 x
P2 (x) = 30 + 6 x
P 3 ( x) = 140
P1 ( 5 ) = 40
P2 (5) = 30 + 30 = 60
P 3 ( 5 ) = 140
P1 ( 10) = 80
p 2 ( 10) = 30 + 60 = 90
P3 ( 10) = 140
Explications étape par étape :