正项级数比值审敛法的必要条件

The Prerequisite Condition of the Inspection Technique to the Series of the Positive Term Ratio

以研究比值审敛法的必要条件为主题,通过极限运算,得到了能用达朗贝尔审敛法判断正项级数收敛或发散的必要条件.

In this paper, the research on the necessary condition of the ratio＇s inspection technique is the theme, so the necessary condition of the series of the positive term＇ s convergence or divergence, theorem 1 and theorem 2 can be discriminated with the D＇Alembert discriminant technique through limiting arithmetic.