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Lucile628
@Lucile628
June 2021
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DM DE MATH
Bonjour j'ai l'exercice de math à faire qui est en pièce jointe mais je n'y arrive absolument pas. Merci d'avance !
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caylus
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Bonjour,
1)
C(q)=1610
=>0.1q²+10q+1500=1610
=>q²+100q-1100=0
Δ=100²+4*1100=14400=120²
q1=(-100+120)/2=10
q2=(-100-120)/2=-110 ( à rejeter car <0)
Vérification: C(10)=0.1*10²+10*10+1500=1610
2)
a:
B(50)=50*87-C(50)=50*87-2250=2100
B(100)=100*87-C(100)=100*87-3500=5200
b:
B(q)=87*q-(0.1q²+10q+1500)=-0.1q²+77q-1500
c:
B(q)=0 <=> -0.1q²+77q-1500=0
Δ=77²-4*0.1*1500=5329=73²
q1=(-77+73)/(-0.2)=20
q2=(-77-73)/(-0.2)=750
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Bonjour j'ai besoin de vous ! J'ai un de math et je ne comprend rien, j'ai Bcp de mal et j'ai vraiment besoin de vous.. Merci d'avance :)
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Verified answer
Bonjour,1)
C(q)=1610
=>0.1q²+10q+1500=1610
=>q²+100q-1100=0
Δ=100²+4*1100=14400=120²
q1=(-100+120)/2=10
q2=(-100-120)/2=-110 ( à rejeter car <0)
Vérification: C(10)=0.1*10²+10*10+1500=1610
2)
a:
B(50)=50*87-C(50)=50*87-2250=2100
B(100)=100*87-C(100)=100*87-3500=5200
b:
B(q)=87*q-(0.1q²+10q+1500)=-0.1q²+77q-1500
c:
B(q)=0 <=> -0.1q²+77q-1500=0
Δ=77²-4*0.1*1500=5329=73²
q1=(-77+73)/(-0.2)=20
q2=(-77-73)/(-0.2)=750