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Qiandong Dong


Last seen: 2 years 前 自 2019 起处于活动状态

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Sum of series II
What is the sum of the following sequence: Σ(2k-1)^2 for k=1...n for different n?

2 years 前

已解决


Sum of series I
What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?

2 years 前