Prove that (n)(r=1)∑r^3=n(n+1)/4
更新1:
我明明打左square= =
pure maths=) solve it quickly~
2009-11-03 2:44 am
Given (n)(r=1)∑r=n(n+1)/2, (n)(r=1)∑r=n(n+1)(2n+1)/6
Prove that (n)(r=1)∑r^3=n(n+1)/4
Prove that (n)(r=1)∑r^3=n(n+1)/4
回答 (3)
2009-11-03 3:41 am
✔ 最佳答案
題目打錯了...........................................圖片參考：http://i726.photobucket.com/albums/ww265/physicsworld2010/physicsworld01Nov021940.jpg?t=1257162105
參考: Physics king
2009-11-03 4:12 am
我冇打漏. 係佢顯示唔到;-)
2009-11-03 3:17 am
連問題都打錯這麼多地方，實在不知怎樣說你好！
收錄日期: 2021-04-19 20:18:18
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