Réponses

2013-12-28T14:32:37+01:00
2/n = 1/n + 1/2n + 1/3n + 1/6n
2/n = 6/6n + 3/6n + 2/6n + 1/6n
2/n = 12 /6n
2/n = 2/n

2/7 = 1/7 + 1/14 + 1/21 + 1/42