求和公式

The grade sequence sum formula are very many,But when solves some quite complex and the special theme, in the application textbook formula appears quite troublesomely.

中文摘要：等差数列是近几年高考的热点内容，等差数列求和的方法很多，但是在解决一些比较复杂和特殊的题目时，应用课本上的公式就显得比较烦琐。

Tabulation of the types of places including: left-justified, center-justified, right-justified, decimal point, such as alignment and vertical alignment, the tab stop to use roughly the same, here only papers in accordance with the requirements of the formula and directory layout tabulation of the production as an example of the use of digital methods and results, a more detailed explanation please refer to the help of Word documents.

制表位的类型包括：左对齐，居中对齐，右对齐，小数点对齐和竖线对齐等，这些制表位的使用方法大致相同，这里仅根据论文中公式排版的要求和目录的制作为例说明制表位的使用方法和效果，更详细的说明请参阅 Word 的帮助文档。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。