Bonjour ;
a.
4/7 et - 7/2 ; car on a :
4/7 x (- 7/2) = - 4/2 = - 2 .
b.
11/6 et - 5/3 ; car on a :
11/6 + 5/3 = 11/6 + 10/6 = 21/6 = 7/2 .
c.
- 7/2 et 3/4 ; car on a :
- 7/2 + 3/4 = - 14/4 + 3/4 = - 11/4 .
d.
- 7/2 et 3/4 ; car on a :
(- 7/2)/(3/4) = (- 7/2) x (4/3) = - 28/6 = - 14/3 .
