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《中学生数学》2007年1月(上)(P_(31))给出了求1~2+2~2+…+n~2的又一方法,如若将其方法稍微改进,则可求得1~3+2~3+…+n~3=1/4n~2。
“Middle school mathematics” January 2007 (above) (P_(31)) gives another way to find 1~2+2~2+...+n~2. If the method is slightly improved, it can be obtained. 1~3+2~3+...+n~3=1/4n~2.