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Marcelhenriyves
@Marcelhenriyves
May 2019
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URGENT, Bonjour, pouvez vous m'aider svp:
On cherche à exprimer l'aire de la figure ci-dessous en fonction de a.
a.Pour chaque proposition, indiquer le découpage utilisé.
b. Proposer une autre expression.
c. Montrer que les différentes expressions peuvent s'écrire 2a²+a+1
MERCI
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Salut !
Réponse en image pour les questions a) et b)
(voir pièces jointes)
c) a² + a(a+1) + 1
= a² + a² + a + 1
= 2a² + a + 1
(2a 1 + 1)(a + 1) - a - a
= 2a² + 2a + a + 1 - 2a
= 2a² + a + 1
5 votes
Thanks 11
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POUVEZ-VOUS M'AIDER, SVP, URGENT MERCI BEAUCOUP
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Verified answer
Salut !Réponse en image pour les questions a) et b)
(voir pièces jointes)
c) a² + a(a+1) + 1
= a² + a² + a + 1
= 2a² + a + 1
(2a 1 + 1)(a + 1) - a - a
= 2a² + 2a + a + 1 - 2a
= 2a² + a + 1