Réponses

2014-09-22T15:09:42+02:00
A = 2ln(3) - ln(5)
A = ln (3) + ln(3)  - ln(5)
A = ln (3 x 3) - ln (5)
A = ln (9) - ln (5)
A = ln (9/5)

Rappel : 
ln(a) + ln(b) = ln(a x b)

ln (a) - ln(b) = ln(a/b)
2014-09-22T15:18:55+02:00
Bonjour
2ln3=ln3 + ln3 = ln(3*3)=ln9
ln(9) - ln(5) = ln (9/5)