Réponses

2013-03-14T15:25:57+01:00

A = (5/3 + 1/9 ) * -1/4

= (5*3/3*3 + 1/9) * -1/4

= (15/9 + 1/9) * -1/4

= 16/9 * -1/4

= -16/36

= -4/9

2013-03-14T15:27:56+01:00