Prove the following statements by mathematical induction,where n is a natural number.
1xn+2(n-1)+3(n-2)+...+(n-1)x2+nx1=1/6n(n+1)(n+2)
這條MI怎樣做呢?
2007-09-26 9:01 pm
回答 (1)
2007-09-26 11:58 pm
✔ 最佳答案
As follows~~~圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/MI26.jpg?t=1190793529
參考: Myself~~~
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https://hk.answers.yahoo.com/question/index?qid=20070926000051KK01744