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NinMario1
@NinMario1
May 2019
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Bonjour pouvez vous m'aider ? c'est juste l'exercice 10
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Christine17
D=0,007v²+0,8v
1)d=0,007x8100+0,8x90
d=56,7+72
d=128,7m
2)d=50
0,007v²+0,8v=50
0,007v²+0,8v-50=0
Δ = 0,64-4(-0,35)=2,04= (1,42)²
v1 = (-0,8 +1,42/0,014 = 44,28
v2 = (-0,8 - 1,42)/0,014 = valeur négative
vitesse=44,28km/h
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Lista de comentários
1)d=0,007x8100+0,8x90
d=56,7+72
d=128,7m
2)d=50
0,007v²+0,8v=50
0,007v²+0,8v-50=0
Δ = 0,64-4(-0,35)=2,04= (1,42)²
v1 = (-0,8 +1,42/0,014 = 44,28
v2 = (-0,8 - 1,42)/0,014 = valeur négative
vitesse=44,28km/h