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floor identity
Tính tổng: $S=\sum_{k=1}^n\left...in Số họcStarted by hxthanh, 31-03-2013 floor identity Last Post by Karl Heinrich Marx, 01-04-2013 |
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floor identity
$\sum_{k=1}^n \left\lfloor\dfrac...in Số họcStarted by hxthanh, 13-11-2012 floor identity Last Post by hxthanh, 13-11-2012 |
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