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lulu97410
@lulu97410
January 2021
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Devoir Maison Maths 3ème.
Bonjour je ne comprends pas un exercice pourriez-vous m'aider?
Merci d'avance !
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nini999
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Bonjour :
Exercice : 6
1)
A = -1/2 + 5/2×(1 - 1/2)
A = -1/2 + 5/2×(2/2 - 1/2)
A = -1/2 + 5/2×(1/2)
A = -1/2 + 5/2×1/2
A = -1/2 + 5/4
A = -2/4 + 5/4
A = 3/4
B = 5/7×7/6 - (1/2 - 1)
B = 5×
7
/
7
×6 - (1/2 - 2/2)
B = 5/6 - (-1/2)
B = 5/6 + 1/2
B = 5/6 + 3/6
B = 8/6
B =
2
×4/
2
×3
B = 4/3
2)
On a : A = 3/4
Et : B = 4/3
Donc :
3/4 c'est l’inverse de 4/3
Alors :
A est l’inverse de B
J’espère t'avoir t'aider
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Thanks 1
lulu97410
Merci beaucoup pour ton aide! ☺️
nini999
Pas de problème :)
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Verified answer
Bonjour :Exercice : 6
1)
A = -1/2 + 5/2×(1 - 1/2)
A = -1/2 + 5/2×(2/2 - 1/2)
A = -1/2 + 5/2×(1/2)
A = -1/2 + 5/2×1/2
A = -1/2 + 5/4
A = -2/4 + 5/4
A = 3/4
B = 5/7×7/6 - (1/2 - 1)
B = 5×7/7×6 - (1/2 - 2/2)
B = 5/6 - (-1/2)
B = 5/6 + 1/2
B = 5/6 + 3/6
B = 8/6
B = 2×4/2×3
B = 4/3
2)
On a : A = 3/4
Et : B = 4/3
Donc :
3/4 c'est l’inverse de 4/3
Alors :
A est l’inverse de B
J’espère t'avoir t'aider