Réponses

2014-01-01T13:50:42+01:00
A = 3/4 -1/2 x 5/6
= 3/4 - 5/12
= 9/12 - 5/12
= 4/12 = 1/3

B = (3/4 - 1/2) x 5/6
= (3/4 - 2/4) x 5/6
= 1/4 x5/6
= 5/24