有感于所谓的严谨。
两道数学建摸的题: #1: Assume that a wolf population is such that (1) the population becomes extinct if the number of wolf falls below a minimum survival level;(2) if the population is above the minimum survival level, then the growth is limited by the carrying capacity; and (3) if the population is above the carrying capacity it will decline because the environment cannot sustain it. What is a model for this situation?
#2: How much daylight does Tucson get in one year?
追求严谨的先生们觉得哪题严谨呢?
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