Réponses

2014-04-02T16:16:00+02:00
a) f(-3)=2/3*(-3)+1
=-6/3 +1
=-2+1=-1
b) f(-1)=2/3*-1+1=-2/3+1=1/3
c) 
f(3/4)=2/3*3/4+1=6/12+1=6/12+12/12=18/12=3/2
Voilà bonne chance :)
  • Utilisateur Brainly
2014-04-02T16:23:56+02:00
Bonjour, 

a) f(-3)= \frac{2}{3} X(-3)+1

= -2+1

=-1


b) f(-1)= \frac{2}{3} X(-1)+1

= - \frac{2}{3} + \frac{3}{3}

= \frac{1}{3}


c) f( \frac{3}{4} )=  \frac{2}{3} X \frac{3}{4} +1

=  \frac{6}{12} + \frac{12}{12}

=  \frac{18}{12}

= \frac{3}{2}=1,5

Bonne journée! :)