Réponses

  • Utilisateur Brainly
2013-09-28T17:12:55+02:00
1/(x-1)+1/(x+1)=1
(x+1)/(x²-1)+(x-1)/(x²-1)=1
2x=x²-1
x²-2x-1=0
x=1-√2 ou x=1+√2