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[数列] 分式递推求范围

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12673zf posted 2024-3-12 15:40 |Read mode

已知$a_1=2,a_{n+1}=\frac{2\sqrt{a_{n}^2+4}}{a_{n}+2\sqrt{n}}$，求$a_n$取值范围

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2025-7-23 09:55 GMT+8

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