This article defines the sensitivity of dispersed variable. And we can use it to analyze the order of a infinite and judge the convergence of a constantterm series.
给出离散变量的灵敏度之定义,且通过变量的灵敏度分析无穷大量的阶,从而判断常数项级数的敛散性。
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Fixed cost a cost that does not vary with the volume of activity in the short term. (Also called Non-variable cost or Constant cost.)