因为一些因素要算几题国中数学 结果居然出现接近无穷等比数列的东西(1加到99)， 现在数学有那麽难哦？ @@ 还好网路上有验算工具 :p https://www.mathsisfun.com/numbers/sigma-calculator.html -- Say you need M$ with you here, beside you... anywhere you go, let M$ go too - , that's all I ask of you... --

※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 140.112.42.22 ※ 文章网址: https://webptt.com/cn.aspx?n=bbs/pighead/M.1475855801.A.773.html ※ 编辑: whhsu (140.112.42.22), 10/07/2016 23:58:34