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¼ö¿­ÀÇ ÇÕ, 1 ºÎÅÍ n ±îÁö n^3 ÀÇ ÇÕ

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1 ºÎÅÍ n ±îÁö n^3 ÀÇ ÇÕÀ» Sn À̶ó Çϸé,

Sn = 1^3 + 2^3 + 3^3 + ¡¦ + n^3 = (n(n+1)/2)^2

   = (n^4)/4 + (n^3)/2 + (n^2)/4

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*** Âü°í¹®Çå[References] ***

https://en.wikipedia.org/wiki/Summation
Sn = (n^4)/4 + (n^3)/2 + (n^2)/4
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