June 2021 0 147 Report
AB est un segment de longueur 11 cm et M est un point de ce segment. Du meme cotes de la droite AB, on construit deux carres,l'un de cote AM et l'autre de cote BM.
On pose x=AM
1) a quelle intervalle appartient x ?
2) Realiser une figure pour x=4 cm
3)On note A (petit 1)(x) l'are du carre de cote AM et A (petit 2)(x) l'aire du carre de cote BM.
determiner l'expression algebrique de A(petit 1)(x) et de A2(ptit 2)(x).
4) on designe par f(x) la somme des aires des 2 carres
  a) Calculer f(x) et verifier que f(x)= 2xau carre-22x+121.
  b) completer le tableau de valeurs de f suivant :
  c) construire la courbe de f dans un repere d'unite 1 cm en abscisses et 1cm pour 10cm au carre en ordonnes,en commençant les graduations de l'axe des ordonnes à 60.
  d) D'apres la courbe de f, quelle est la valeur minimale de f(x)?pour quelle valeur de x est-elle atteinte?
 e)determiner graphiquement les antecedents de 73, s'il en existe.
5) on veut maintenant retrouver algebriquement les resultat de la question 4e)
 a) developper 2(x-3)(x-8).
 b) utiliser la question 5a) pour determiner algebriquement les antecedents de 73.

merci d'avance je donnerai biensur des merci si vous m'aider
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