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thaolehuong975
2 năm trước
Cho u0 = 2 $u_{n+1}=3u_n+\sqrt{8u_n^2+1}$ Tìm số hạng tổng quát/ Em làm tới $u_{n+1} - 6u_n + u_{n-1} = 0$ rồi ạ.
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