TD 4 : Informatique

B
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
(un)
u0=−1, u1= 2 et ∀n∈N, un+2 = 2un+1 + 3un+ 4
n un>500 000

u n m
u0
unun+1 = 0,5un
unun+1 = 3un+ 1
1u0

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Ë

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Ë
Ì
Ê(un)
u0= 2, u1= 5 et ∀n∈N, un+2 = 5un+1 −6un
n un
Ë
n n
c3

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Ë
Ì