Réponses

2013-05-26T20:45:02+02:00

Bonsoir

 

a 1 +1/2 = 2/2 +1/2 = 3/2

B = (1+1/3) x (1-1/3= ( 3/3 +1/3) x (3/3 -1/3) = 4/3 x 2/3 = 8/9

C = -1/5+1/5 x -2/3 = 0 x -2/3 = 0