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Sagot :

Réponse :

1) 40 mètres de grillage en tout

Si FG = 12m donc  GH =(40-12)/2 = 14m

Aire = 12x14 = 168m²

2) GH = (40-X)/2

3) a) Aire de l'enclos = X [(40-X)/2]

b) f(4) = 4(40-4/2) = 72m²

c) f(28) = 28(40-28/2) = 168m²

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