在数列 1, 1/2, 1/3, 1/4, 1/5, ..., 1/n, ...... 中找出 2025 项。
而这2025项恰好是等差数列
在数列 1, 1/2, 1/3, 1/4, 1/5, ..., 1/n, ...... 中找出 2025 项。
而这2025项恰好是等差数列
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试解
-monseigneur-
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11/10/2025 postreply
19:37:08
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厉害
-贫论贫论-
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11/11/2025 postreply
06:38:51
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等比子数列反而很容易找
-贫论贫论-
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11/11/2025 postreply
06:40:09
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