Réponse :
Explications étape par étape
Bonsoir
.......... C
..... A ..|.. B
-1/8 | 1/4 | 1/2
A = -1/8 + 1/4
A = -1/8 + 2/8
A = 1/8
B = 1/4 + 1/2
B = 1/4 + 2/4
B = 3/4
C = 1/8 + 3/4
C = 1/8 + 6/8
C = 7/8
..........7/8
.......1/8 | 3/4
..-1/8 | 1/4 | 1/2
............-3
....-13/6 | D
2/3 | .. E | F
E + 2/3 = -13/6
E = -13/6 - 2/3
E = -13/6 - 4/6
E = -17/6
D - 13/6 = -3
D = 13/6 - 3
D = 13/6 - 18/6
D = -5/6
F + E = D
F = D - E
F = -5/6 + 17/6
F = 12/6
F = 2
............-3
....-13/6 | -5/6
2/3 | -17/6 | 2