Réponse :
f(x) = - 3 x + 7
Calculer
a) f(-2) = - 3*(-2) + 7 = 13
b) f(x) = - 3 x + 7 = 0 ⇔ x = 7/3
c) f(3) = - 3*3 + 7 = 1
d) f(x) = 25 = - 3 x + 7 ⇔ 3 x = - 18 ⇔ x = - 18/3 = - 6
Explications étape par étape :
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Réponse :
f(x) = - 3 x + 7
Calculer
a) f(-2) = - 3*(-2) + 7 = 13
b) f(x) = - 3 x + 7 = 0 ⇔ x = 7/3
c) f(3) = - 3*3 + 7 = 1
d) f(x) = 25 = - 3 x + 7 ⇔ 3 x = - 18 ⇔ x = - 18/3 = - 6
Explications étape par étape :