Réponses

2014-10-29T13:46:42+01:00
Salut;

Uo=2
U(n+1)=-1.2Un -1 

On calcule:
U1= -1.2Uo - 1= -1.2 x 2 -1 = -2.4 -1 = -3.4
U2= -1.2U1 - 1= -1.2 x (-3.4) -1 = 3.08
U3= -1.2U2 - 1= -1.2 x 3.08 -1 = -4.696

Cordialement.