Réponses

  • Utilisateur Brainly
2013-09-08T13:29:37+02:00
f(x)=(x²+3)/(1-x)

(u/v)'=(u'v-uv')/v²

f'(x)=((2x)(1-x)-(-1)(x²+3))/(1-x)²
     =(-2x²+2x+x²+3)/(1-x)²
     =(-x²+2x+3)/(1-x)²
     =((x+1)(3-x))/(1-x)²