分段函数是函数问题中难点，本文就分段函数在分界点的极限，导数、定积分的运算问题探讨一些新方法。
This text will talk about some new methods about the limit of disjunction function in the boundary and the operation of lead number and definite integral.
在高等数学的教学中发现很多学生在函数极限运算方面面临不少问题。
Found many students facing many troubles in higher math's study in the limit of function operation aspect.
由于电子计算机的存贮量小，运算速度慢，智能化低，特别是制造工艺趋于极限。
Due to small storage capacity, slow operational speed and low intelligentize of electronic computer, Particular, its manufacture technics go to limit.
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