Réponse :
bonjour,
f(x) = 5/4x-2.
f(0)= 5/4×0 -2
f(0) = -2
f(-2) = 5/4 ×-2 -2
f(-2) = -10/4 - 2
f(-2) = -10/4- 8/4
f(-2) = -18/4
f(16/5) = 5/4 ×16/5 -2
f(16/5) = 80/20 - 2
f (16/5) = 8/2 -2
f (16/5 ) = 8/2 - 4/2
f (16/5 ) = 4/2
2) f(x) = 5/4x-2.
0 = 5/4 x -2
5/4x = 2
5x/4 × 4 = 2×4
5x = 8
x = 8/5
l'antecedent de 0 est 8/5
voila :)
Explications étape par étape :
