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Bonjour ,j'ai besoin d'aide j'ai un devoir maison a rendre et je ne comprend rien je vs remercié d'avance
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En gros tu remplace "n" par sa valeur et tu fais les calcul
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pierre1458528
1) a) A=
1/2 (3² + 3)
= 1/2 x 3² + 1/2 x 3
= 1/2 x 9 + 1/2 x 3
= 9/2 + 3/2
= 12/2
= 6
B= 3²/2 + 3/2
= 9/2 + 3/2
= 12/2
= 6
C= 3/2 (3+1)
= 3/2 x 3 + 3/2 x 1
= 9/2 + 3/2
= 12/2
b) A= 1/2 (5² + 5)
= 1/2 x 5² + 1/2 x 5
= 1/2 x 25 + 1/2 x 5
= 25/2 + 5/2
= 30/2
B= 5²/2 + 5/2
= 25/2 + 5/2
= 30/2
C= 5/2 (5 + 1)
= 5/2 x 5 + 5/2 x 1
= 25/2 + 5/2
= 30/2
Il faut faire cela pour chaque exercice
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= 1/2 x 3² + 1/2 x 3
= 1/2 x 9 + 1/2 x 3
= 9/2 + 3/2
= 12/2
= 6
B= 3²/2 + 3/2
= 9/2 + 3/2
= 12/2
= 6
C= 3/2 (3+1)
= 3/2 x 3 + 3/2 x 1
= 9/2 + 3/2
= 12/2
b) A= 1/2 (5² + 5)
= 1/2 x 5² + 1/2 x 5
= 1/2 x 25 + 1/2 x 5
= 25/2 + 5/2
= 30/2
B= 5²/2 + 5/2
= 25/2 + 5/2
= 30/2
C= 5/2 (5 + 1)
= 5/2 x 5 + 5/2 x 1
= 25/2 + 5/2
= 30/2
Il faut faire cela pour chaque exercice