January 2021 0 28 Report
Bonsoir, j'ai un souci avec cette exercice. Je rentre tout juste en terminale S et je n'ai jamais vu ceci. Pouvez-vous m'aider s'il vous plaît ? L'énoncé:
i. Soient u et v deux réels tels que u3+ v3=6 et uv =2 ;démontrer alors que (u+v)est solution de x3-6x-6=0
ii. Démontrer alors que u3et v3sont solutions de la nouvelle équation X2-6x+8=0
iii. Résoudre X2-6x+8=0 (attention !!ne pas confondre x et X)
iv. En déduire alors u et v (il faudra utiliser la fonction ,appelée racine cubique ; et notée x3x )puis la (les) solution(s) de x3-6x-6=0

J'ai réussi la première question mais je n'arrive pas à faire le reste...
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J'aurais besoin d'aide svp
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