Réponse :
bonjour
f (x) = 2 x - 5
f (1) = 2 - 5 = - 3
f ( 10) = 20 - 5 = 15
f ( - 6 ) = - 12 - 5 = - 17
g (x ) = 100 - 4 x
g ( 0 ) = 100
g ( 12 ) = 100 - 48 = 52
g ( - 5 ) = 100 + 20 = 120
h (x) = 5 x + 1
h (x) = - 19
= 5 x + 1 = - 19
5 x = - 20
x = - 4
h (x) = 7
5 x + 1 = 7
5 x = 6
x = 6/5
k (x) = - x - 3
- x - 3 = 5
- x = 8
x = - 8
- x - 3 = - 4.5
- x = - 4.5 + 3 = - 1.5
x = 1.5
Explications étape par étape :
