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AlaskaW
@AlaskaW
January 2021
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Bonsoir,
Aidez-moi pour l'exercice 2, s'il vous plait. Merci.
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winner123
Verified answer
Bonjour
f(x) = 3 x + 7
f(-8) = - 24 x - 56
n + n +1 + n + 2 = 2 160
3 n = 2 157
n = 719
719, 720 et 721
- 3 x + 15 = 36
-
3 x = 36 - 15
- 3 x = 21
x = - 7
largeur = l
longueur = 3 l
l ( 3 l) = 48
3 l² = 48
l² = 16
l = √16 =
4 cm
l = 4 donc L = 12
aire = 48 cm²
2 votes
Thanks 1
AlaskaW
Merci beaucoup, madame !
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Verified answer
Bonjourf(x) = 3 x + 7
f(-8) = - 24 x - 56
n + n +1 + n + 2 = 2 160
3 n = 2 157
n = 719
719, 720 et 721
- 3 x + 15 = 36
- 3 x = 36 - 15
- 3 x = 21
x = - 7
largeur = l
longueur = 3 l
l ( 3 l) = 48
3 l² = 48
l² = 16
l = √16 = 4 cm
l = 4 donc L = 12
aire = 48 cm²