Bonsoir,

1)

def termes(n):

   u = 1

   print("u(0) = 1")

   for i in range(1, n):

       u = 1.2 * u + 1

       print("u({}) = {}".format(i, round(u, 3)))

Résultat:

u(0) = 1

u(1) = 2.2

u(2) = 3.64

u(3) = 5.368

u(4) = 7.442

u(5) = 9.93

u(6) = 12.916

u(7) = 16.499

u(8) = 20.799

u(9) = 25.959

2)

def seuil(V):

   p = 0

   u = 1

   while u <= V:

       u = 1.2 * u + 1

       p += 1

   print(p)

Résultat: 16

Bonne soirée.