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EQUATIONS IRRATIONNELLES

Rappel

Résoudre : 

a.  12 x + 4 = 0

b.  36 x + 2 = 0

Annonce du Sujet

 

Analyse

Définir l'équation irrationnelle.

Comment peut-on résoudre les équations irrationnelles ?

Qu'est-ce que nous venons de voir ? 

Résoudre : 

a.  12 x + 4 = 0

b.  36 x + 2 = 0

Aujourd'hui, nous allons étudier les équations irrationnelles.

Equation irrationnelle

Définition

Une équation est dite irrationnelle en x  si elle renferme au moins un signe radical.

 

Pour résoudre les équations irrationnelles, on élève les 2 membres au carré et on amène au premier ou au 2ème l'autre équation du premier ou du second que l'on doit résoudre.

Nous venons de voir les équations irrationnelles.

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