Calculus

[匿名]

2015-03-23 3:24 pm

Find the value of the sum
n
Σ i (i+1)(i+2)
i=1

回答 (1)

pingshek

2015-03-23 4:20 pm

✔ 最佳答案

答案如下：


圖片參考：https://s.yimg.com/lo/api/res/1.2/r.QCi9u0F3hhNcVDTaCpBA--/YXBwaWQ9dHdhbnN3ZXJzO3E9ODU-/https://farm9.staticflickr.com/8736/16277554474_b95590ac9a_o.png


https://farm9.staticflickr.com/8736/16277554474_b95590ac9a_o.png

參考: pingshek

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