Réponses

2013-11-03T19:26:47+01:00
A= 7/18 x 2/7 -3 x (5/3-1)
=2/18-3*(5/3-3/3)
=2/18-3*2/3
=1/9-2
=1/9-18/9
=-17/9
2013-11-03T19:28:12+01:00
A= 7/18 x 2/7 -3 x (5/3-1)
a=2/18-3x(5/3-1x3/3)
a=1/9-3x(2/3)
a=1/9-6/3
a=1/9-2x9/9
a=(1-18)/9
a=-17/9