Réponses

2013-02-28T23:05:16+01:00

A = -1/4 * -10/21 = 5/42

 

B = 7/3 * 3(4*7) = 1/4

 

C = 2/3 * 6/5 - 2/5 = 4/5 - 2/5 = 2/5

 

En espérant t'avoir aidé.