Réponses

2014-09-15T17:41:30+02:00
F(x) = 8
x² = 8

x = √8     ou         x = -√8

f(x) = 1
x² = 1

x = 1     ou        x = -1

f(x) = -2
x² = -2
impossible car f(x) >0 sur |R