1/2 + ... + 1/2^k + ... + 1/2^(n-1) + (1/2^(n-2))*(1/3+1/6)

來源: wxcfan123 於 2023-03-10 16:28:40 [舊帖] [給我悄悄話] 本文已被閱讀：次

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