1的2次方+2的2次方+3的2次方+.......+n的2次方=???
how to do it,,,,,????
help....me ...
thanks
help...sos
2007-09-06 4:29 am
回答 (1)
2007-09-06 4:39 am
✔ 最佳答案
1的2次方+2的2次方+3的2次方+.......+n的2次方=n+3(n-1)+5(n-2)+7(n-3)+9(n-4)+.......+(n-3)4+(n-2)3+(n-1)2+n自己黎ga8D
唔好炒我
參考: 自己想ga8D
收錄日期: 2021-04-13 18:34:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070905000051KK03797