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foolmeo
[TẶNG BẠN] TRỌN BỘ Bí kíp học tốt 08 môn
Chắc suất Đại học top - Giữ chỗ ngay!!
ĐĂNG BÀI NGAY để cùng trao đổi với các thành viên siêu nhiệt tình & dễ thương trên diễn đàn.
[tex]\left\{ \begin{array}{l} u_1 + u_2 = 1 \\ u_n = 2u_{n-1} + u_{n-2} \end{array} \right.[/tex] [tex]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\forall n \geq 3[/tex]
[tex]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ CMR \ u_n < 6u_{n-2} \forall n \geq 5[/tex]
[tex]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ CMR \ u_n < 6u_{n-2} \forall n \geq 5[/tex]