摘要
部分初等函数的原函数不一定是初等函数.根据刘维尔定理导出了形如()()eg xf x(其中f(x),g(x)是初等函数)的函数的初等可积的一个必要条件,这个判据比刘维尔定理更为实用.
Some primitive functions of the elementary functions is not always the elementary functions. According to Liouville theorem, derived a necessary condition for the elementary integrable of the fuctions like f(x)e8(x), where f(x), g(x) are elementary functions. This criterion is more practical than Liouville theorem.
出处
《高师理科学刊》
2011年第6期12-15,共4页
Journal of Science of Teachers'College and University
关键词
初等积分
原函数
刘维尔定理
elementary integration
primitive function
Liouville theorem