Bonjour, es ce que quelqu’un pourrait m’aider pr l’exercice 3 svp ?

bonjour

f (x) = 8 x + 1

f (2) = 16 + 1 = 17

f ( - 3) = - 24 + 1 = - 23

f ( - 5) = - 40 + 1 = - 39

8 x + 1 = - 15

8 x = - 15 - 1

8 x = - 16

x = - 2

Réponse:

Bonjour,

1) f(2) = 8*2 + 1 = 16 + 1 = 17

f(-3) = 8*(-3) + 1 = -24 + 1 = -23

2) f(-5) = 8*(-5) + 1 = -40 + 1 = -39

3) 8x+1 = -15

8x = -15 - 1

8x = -16

x = -16 = -2

8