2011-09-21 71 views
3

我想計算序列如何告訴Wolfram Alpha我希望它計算整數序列的項?

(14747-40*n)/(2621440*(41-n)), n from 1 to 40 

我試着在Wolfram Alpha的輸入上面的條款清單,並繪製了我函數的曲線圖。這不是我想要的。我嘗試過對這個命令的變化,以及猜測各種關鍵字在它之前的位置,並且我要麼得到相同的東西,要麼就是無益的。

help page on sequences建議你可能用序列做的各種事情,但沒有說如何做這樣簡單的事情?

回答

3

以下工作:

Table[(14747-40*n)/(2621440*(41-n)) n, {n, 1, 40}] 

點擊 「近似形式」,然後點擊 「複製明文」 上給出了以下幾點:

{0.000140257,0.000286924,0.000440507,0.000601567,0.000770728, 0.000948683 ,0.00113621,0.00133417,0.00154356,0.00176547, 0.00200115,0.00225204,0.00251976,0.00280618,0.00311345, 0.00344409,0.00380101,0.00418764,0.00460803,0.00506701, 0.00557035,0.00612 508,0.00673974,0.00742493,0.00819385, 0.00906326,0.0100547,0.0111963,0.0125257,0.0140939,0.0159728, 0.0182658,0.0211282,0.0248041,0.0297003,0.0365488,0.0468139, 0.0639122,0.0980936,0.200607}

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