分段函数分段点可导性的判定

摘要

对求分段函数在分段点处求导的方法进行总结，解释分段区间上导函数在分段点处极限不存在从而导致先求导再求极限方法失效的原因，并对利用分段函数在分段点处的一阶可导性确定函数参数的问题进行分析．%In pieeewise-defined and the limit of t s paper, we summarize various methods for calculating the derivative of a nction at an interphase point, and discuss the relation between the derivative derivative function at such point. Problems of determining parameters using derivative at an interphase point are also analyzed.