Réponse :
Bonjour
Explications étape par étape :
Exercice 12
T = 1 + 1 + 1 = 1/7 X 5/5 + 1/5 X 7/7 + 1/35 = 5/35 + 7/35 + 1/35 = 13/35
7 5 35
U = 3/4 + 2/5 + 7/20 = 3/4 X 5/5 + 2/5 X 4/4 + 7/20 = 15/20 + 8/20 + 7/20 = 30/20 = 3/2
V = 3 + 5/2 + 3/4 = 3 X 8/8 + 5/2 X 4/4 + 3/4 X 2/2 = 34/8 + 20/8 + 6/8 = 60/8 = 30/4 = 15/2
W = 2/3 - 5/4 - 11/12 = 2/3 X 4/4 -5/4 X 3/3 - 11/12 = 8/12 -15/12 - 11/12 = 8/12 - 26/12 = - 18/12 = -9/6 = -3/2
Y = 1/2 + 4/3 - 5/6 = 1/2 X 3/3 + 4/3 X 2/2 - 5/6 = 3/6 +8/6 -5/6 = 6/6 = 1
Z = 2 - 6/7 + 3/2 = 2 X 14/14 -6/7 X 2/2 + 3/2 X 7/7 = 28/14 -12/14 +21/14 = 37/14
