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MinatoNM
@MinatoNM
January 2021
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Bonjour j'ai terminer mon DM mais j'aimerais savoir pourquoi l'air de l'enseigne a était écrit commence ça :
3x²/2 - 200x + 40 000
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Amateur
Bonjour,
Aire ABCD=(200-x)²
Aire EFGH=200*x
Aire KJI = x²/2 car triangle rectangle isocèle (45°)
Aire totale=40000+x²-400x+200x+x²/2=3x²/2-200x+40000=A(x)
Aire minimum= A'(x)=2*3x/2-200=0=>x=200/3
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Aire ABCD=(200-x)²
Aire EFGH=200*x
Aire KJI = x²/2 car triangle rectangle isocèle (45°)
Aire totale=40000+x²-400x+200x+x²/2=3x²/2-200x+40000=A(x)
Aire minimum= A'(x)=2*3x/2-200=0=>x=200/3