Réponses

2013-01-30T15:22:34+01:00

f(x)= -5x + 2

 

Donc f(2)= -5*2 + 2 = -10 + 2 = -8

Donc f(-3)= -5*(-3) + 2 = 15 + 2 = 17

Donc f(0)= -5*0 + 2 = 0 + 2 = 2

 

Si f(x) = 13

Alors -5x + 2 = 13

-5x = 13 - 2

-5x = 11

x= -11/5