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Qiandong Dong


Last seen: environ un an il y a Actif depuis 2019

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A résolu


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

plus d'un an il y a

A résolu


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

plus d'un an il y a