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D88EC7E8-E3FB-4F6D-A2CE-00F7A1C48C48@1xCreated with sketchtool.Watch from niconico

自然数の3乗の総和（無限和）1+8+27+64+...=1/120、1^3+2^3+3^3+4^3...=1/120の視覚化Watch from niconico

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自然数の3乗の総和（無限和）1+8+27+64+...=1/120、1^3+2^3+3^3+4^3...=1/120の視覚化

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