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题目内容
1+2+3+......+n=$$\frac{n(n+1)}{2}$$
For each integer n greater than 1, the sum of the first n positive integers is given by the formula shown.
If the average (arithmetic mean) of the first n positive integers is k, what is the sum of the first n positive integers in terms of k?
For each integer n greater than 1, the sum of the first n positive integers is given by the formula shown.
If the average (arithmetic mean) of the first n positive integers is k, what is the sum of the first n positive integers in terms of k?
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· 相关考点
3.1.1 代数式基本运算原理
3.1.1 代数式基本运算原理
以上解析由 考满分老师提供。