Maths Challenge

👨🏻‍🏫 學術台數學

2007-10-05 5:20 pm

Find Sn for 2+22+222+...

回答 (2)

魏王將張遼

2007-10-05 6:22 pm

✔ 最佳答案

As follows:

圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Oct07/Angel2.jpg

圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Oct07/Angel3.jpg

參考: My Maths knowledge

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2007-10-05 8:02 pm

唔好意思,由於等級關係未能貼圖,請按以下link
本人的方法是做2次GS sum
http://i109.photobucket.com/albums/n60/naozumilok/forum/2007-10-05_115131.jpg

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收錄日期: 2021-04-13 19:30:41
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