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+ (o) QUESTION 4. [8 points] On considere la fonction f(x, y) = ry' + 2ry. a) Trouver les derivees. partielles fr(r, y) et fy(x,

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+ (o) QUESTION 4. [8 points] On considere la fonction f(x, y) = ry' + 2ry. a) Trouver les derivees. partielles fr(r, y) et fy(x, y) b) Trouver tous les points critiques de f. c) Classifier tous les points critiques obtenus dans la question precedente. X 53 .F hp

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