Réponse:
f'(x) = 5×1/x
donc f'(5) = 1
partie B
U1 = Uo × 1,003 = 1600 × 1,003 = 1604,8
U3 = U2 × 1,003 = U1 × 1,003 × 1,003 = 1614,443
