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拿几何画板画个函数图像试试~

Posted by palmtenor at 2005-06-06 14:17:03 on Problem 2100
In Reply To:直接pow(***,1.0/3) Posted by:frkstyc at 2005-06-06 14:14:00

Followed by:

ft，用一点数学！1^2+...+n^2=n(n+1)(2n+1)/6=2n(2n+1)(2n+2)/24，直接开立方就可以估算2n了 (0) frkstyc 2005-06-06 14:19:05
- 有道理....数学啊....我怎么说呢..... (0) palmtenor 2005-06-06 14:22:22

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