With the help of Newton formula and Vieta theorem, iterative method was used to solve problems of power sum.
借助牛顿公式和韦达定理，采用迭代的方法求解类似于自然数等幂和的问题。
This problem of a fifth power mean value computing formula of base 3 digits sum has been solved, and an exact calculation formulaA5(N)has been obtained.
主要解决了三进制之和函数五次均值的计算问题，得出了一个精确的计算公式。
Using elementary method, digital function sum and its 8-th power means value formula was supposed and induced, an exact calculation formula was obtained.
采用初等方法，对二进制数字之和函数的八次均值的计算进行了猜想、归纳，得出了精确的计算公式。
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