Réponses

2013-04-22T14:46:22+02:00

A= 3/7 x (7/3-5/6)

  = 3/7 x (14/6-5/6)

  = 3/7 x 9/6

  = 3/7 x 3/2

  = 9/14

  

2013-04-22T14:47:49+02:00

A= 3/7 x (7/3-5/6)

= 3/7 x (7x2/3x2-5/6)

= 3/7 x (14-5/6)

= 3/7 x 9/6

= 1/7 x 9/2

= 9/14