Réponses

  • Utilisateur Brainly
2013-06-10T21:13:06+02:00

f(x)=√(x²-1)-√(-x²+1)

     =((x²-1)-(-x²+1)/(√(x²-1)+√(-x²+1))

    =(2x²)/(√(x²-1)+√(-x²+1))

 

ln(2)e^{-x}+e^{x}

=ln(2)/e^x+e^x

=(ln(2)+e^(2x))/(e^x)