plz ans in detail thanks

Xxx

2012-09-01 2:20 am

http://imageshack.us/photo/my-images/442/123wma.png/
prove this for all positive integer n. (in the easiest way)

回答 (1)

用戶9112

2012-09-01 6:25 pm

✔ 最佳答案

http://i1090.photobucket.com/albums/i376/Nelson_Yu/int-2470.jpg

圖片參考：http://i1090.photobucket.com/albums/i376/Nelson_Yu/int-2470.jpg

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