f (x) = x²+2x-3
calculer les images de 0 , -3 , et racine de 2-1 !
merci d'avance
f(0)=-3
f(-3)=0
f(racine(2)-1)=(racine(2)-1)²+2(racine(2)-1)-3
=2+1-2racine(2)+2racine(2)-2-3=-2
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f(0)=-3
f(-3)=0
f(racine(2)-1)=(racine(2)-1)²+2(racine(2)-1)-3
=2+1-2racine(2)+2racine(2)-2-3=-2