Integral that upper limit of integral is variable is a important theory, results of operation is function forma after all. Research this kind of function, get a few theorem.
变上限积分是积分学的一个重要理论，其运算结果仍以函数的形式体现。研究这类函数，得出几个颇有理论意义的定理。
Integral that upper limit of integral is variable is a important theory, results of operation is function forma after all.
变上限积分是积分学的一个重要理论，其运算结果仍以函数的形式体现。
Many ways to limit demand function, and very flexible, so the research and summarized the methods limit demand function is particularly important.
求函数极限的方法很多，而且非常灵活，因此研究与总结求函数极限的方法尤为重要。
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