Réponses

2013-01-19T21:21:13+01:00

A= 2ln(10)-3ln(5)+ln(2)

= ln(10^2)-ln(5^3)+ln(2)

= ln(100)-ln(125)+ln(2)

= ln(100*2/125)

= ln(200/125)

= ln(8/5)

 

B= 7ln(4)-3ln(2)-4ln(8)

= ln(4^7)-ln(2^3)-ln(8^4)

= ln(16384)-ln(8)-ln(4096)

= ln(16384/(8*4096))

= ln(256/512)

= ln(1/2)

 

etc...bon courage