Qiandong Dong
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Solve a problem for the first time
Awarded to Qiandong Dong on 23 Nov 2022
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Awarded to Qiandong Dong on 09 Aug 2022
Provide your first answer ever to someone else's question
Awarded to Qiandong Dong on 09 Aug 2022
Accept 2 answers given by other contributors
Awarded to Qiandong Dong on 15 Feb 2022
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解決済み
Sum of series II
What is the sum of the following sequence: Σ(2k-1)^2 for k=1...n for different n?
約2年 前
解決済み
Sum of series I
What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?
約2年 前
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