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mgrd
@mgrd
January 2021
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Bonsoir, sa fait 30min que je bloque sur l'exercice 3 3), c'est du niveau 4e, merci d'avance.
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PassePhilippe
N , nombre choisi au départ
n
n-3
(n-3)(-2)=-2n+6
-2n+6-9=-2n-3
A pour n = 8
A= -2(8)-3
A= -16-3
A= -19
pour n = -4
A= -2(-4)-3
A=5
A = 5
-2n-3=5
-2n=5-3
n=-1
0 votes
Thanks 1
mgrd
Merci beaucoup
inequation
Verified answer
N
n - 3
-2(n-3)
9-2(n-3)
9-2n+6
15-2n = A
pour n = 8 A = -1 pour n = -4 A= 23 et si A = 3 alors n = 6
0 votes
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n
n-3
(n-3)(-2)=-2n+6
-2n+6-9=-2n-3
A pour n = 8
A= -2(8)-3
A= -16-3
A= -19
pour n = -4
A= -2(-4)-3
A=5
A = 5
-2n-3=5
-2n=5-3
n=-1
Verified answer
Nn - 3
-2(n-3)
9-2(n-3)
9-2n+6
15-2n = A
pour n = 8 A = -1 pour n = -4 A= 23 et si A = 3 alors n = 6