Réponse :
bonsoir
Explications étape par étape :
A = 1/3 + 2/7 + 8/9 + 5/7 + 2/18 + 8/3
⇒ 2/18 = 1/9
A = (1/3 + 8/3) + (2/7 + 5/7) + (1/9 + 8/9 )
A = 9/3 + 7/7 + 9/9
A = 3 + 1 + 9/9
A = 3 + 1 + 1
A = 5
B = 11/22 + 10/24 + 5/15 + 2/3 + 7/12 + 3/2
⇒ 11/22 = 1/2
⇒ 10/24 = 5/12
⇒ 5/15 = 1/3
B = (1/2 + 3/2 )+ (1/3 + 2/3) + (5/12 + 7/12)
B = 4/2 + 3/3 + 12/12
B = 2 + 1 + 1
B = 4
bonne soirée
