Réponses

2014-03-24T18:28:30+01:00
D = 1 - 4/3
      1 + 4/3
D = 1 x 3 / 1 x 3 - 4/3
       1 x 3 / 1 x 3 + 4/3
D = 3/3 - 4/3
      3/3 + 4/3
D = -1/3
       7/3
D = -1/3 : 7/3
D = -1/3 x 3/7
D = -1 x 3
       3 x 7
D = -3/21
D = 3 x - 1 / 3 x 7
D = -1/7