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Maxiburger912
@Maxiburger912
May 2019
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Bonjour si vous pouvez m’aidez ce devoir de serait cool ! :)
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AhYan
1. Volume pavé = 10×10,5×14 = 1470 cm³
2)a. Volume lanterne = volume pavé + volume pyramide
Volume pyramide = ⅓ × (base×h) = ⅓×(10×10,5×x) = 105x/3 = 35x cm³
Donc :
Volume lanterne (V) = 1470 + 35x
2)b. Pour x = 7
V(7) = 1470 + 35×7
V(7) = 1715 cm³
2)c. V(x) = 1862
1470 + 35x = 1862
35x = 1862 - 1470
35x = 392
x = 392/35
x = 11,2cm
2)d. B2 il faut entrer l'expression : = 1470 + 35*A2
2)e. Il faut lire le graphique.
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maxiburger912
Merci
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Lista de comentários
2)a. Volume lanterne = volume pavé + volume pyramide
Volume pyramide = ⅓ × (base×h) = ⅓×(10×10,5×x) = 105x/3 = 35x cm³
Donc :
Volume lanterne (V) = 1470 + 35x
2)b. Pour x = 7
V(7) = 1470 + 35×7
V(7) = 1715 cm³
2)c. V(x) = 1862
1470 + 35x = 1862
35x = 1862 - 1470
35x = 392
x = 392/35
x = 11,2cm
2)d. B2 il faut entrer l'expression : = 1470 + 35*A2
2)e. Il faut lire le graphique.