Déterminer \((u_n)\) telle que
1
\(u_0 = 1\), \(u_1 = 3\), \(u_{n + 2} = 4u_{n + 1}-4u_n\).
2
\(u_0 = 1\), \(u_1 = i\), \(u_{n + 2} = 4u_{n + 1}-5u_n\).
Déterminer \((u_n)\) telle que
\(u_0 = 1\), \(u_1 = 3\), \(u_{n + 2} = 4u_{n + 1}-4u_n\).
\(u_0 = 1\), \(u_1 = i\), \(u_{n + 2} = 4u_{n + 1}-5u_n\).