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請問這個Sigma整理後就是： (a(a+1)/2)* (b(b+1)/2)* (c(c+1)/2)* (d(d+1)/2)* (e(e+1)/2) ？ 自己算了好幾次但還是不確定 ----- Sent from JPTT on my HTC_B810x. -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 223.139.131.124※ 文章網址: http://www.ptt.cc/bbs/ask/M.1417076725.A.67A.html
→wxtab019: 和他無關的就當作常數提出去就好 所以沒錯11/27 16:35
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朋友給的免費電影卷，但是期限到明天禮拜五為止，北屯崇德路/文心路口。或是松竹路口附近自取，以可以配合我贈送時間地點為優先。 ----- Sent from JPTT on my HTC One X+. -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 1.165.183.134※ 文章網址: http://www.ptt.cc/bbs/give/M.1417078131.A.8B2.html
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