Réponse :
Explications étape par étape
a/ a =4 b = -5
b/ g(x) = -7x+6 a = -7 b = 6
c/ a 0 1 b = 2
d/ a = 0,5 b = 1,5
e/ a=0 b = -14
Pour tout x la fonction renvoie -14
f/ a =3 b = 0
f(x) = 1,5x -3
a/ f(4) = 1,5 . 4 -3 = 3
f(-3) = 1,5 . (-3) -3 = -7,5
f(4/5) = 1,5 .4/5 - 3 = 3/2 . 4/5 -3 = -9/5 =-1,8
f(-8/3) = 1,5 . (-8/3) -3 = 3/2 .(-8/3) -3 = -7
b/ 1,5 x - 3 = 0
⇔ 1,5 x = 3
⇔ x = 2
1,5 x -3 = 5
⇔ 1,5x = 8
⇔ x = 8/ (3/2)
⇔ x = 16/3
1,5x - 3 = -5
⇔ 1,5x = -2
⇔ x = -2/ (3/2)
⇔ x = -4/3
