Réponses

  • Utilisateur Brainly
2013-12-28T16:16:44+01:00
f(x) = x²/4  - 3x/5  + 2 
f'(x)=x/2-3/5

 f(x) = -3/x 
f'(x)=3/x²

 f(x) = (7x -2 )/( 5x +4)
f'(x)=(7(5x+4)-5(7x-2))/(5x+4)²
     =38/(5x+4)²