bonjour
4/3 ⇔ inverse = 3/4 ⇔ opposé = - 4 /3
- 7/5 ⇔ inverse = - 5/7 ⇔ opposé = 7/5
1 /6 ⇔ inverse = 6 ⇔ opposé = - 6
- 1/7 ⇔ inverse = - 7 ⇔ opposé = 1/7
- 8 /9 ⇔ inverse = - 9/8 ⇔ opposé = 8 /9
