2003 - Annales du Baccalauréat
... pc)dVc = (ps ? pc)4?r2. 2dr2. 7. d?=4? · 2r2dr2. dWTS = ?d?=8??r2dr2. 8. En imposant dF = ?Wp + dWTS = (ps ? pc)4?r2. 2dr2 + 8??r2dr2 = 0 on obtient (ps ? pc) ...
... pc)dVc = (ps ? pc)4?r2. 2dr2. 7. d?=4? · 2r2dr2. dWTS = ?d?=8??r2dr2. 8. En imposant dF = ?Wp + dWTS = (ps ? pc)4?r2. 2dr2 + 8??r2dr2 = 0 on obtient (ps ? pc) ...