摘要
极限理论是微积分教学中的重要内容。由于幂指函数是一种特殊的函数,对幂指函数求极限往往是比较复杂的问题。以一道幂指函数题目为例,分别使用定值法、等价无穷小代换法、洛必达法则三种方法来求解。通过一题多解,总结出幂指函数求极限的常用方法,以供教学参考。
Limit theory is the important content of calculus. Due to the power exponential function is a special function, it is more complex that the problem of power exponential function limit. For example, uses fixed value method, equivalent infinitesimal substitution method, LHospi- tal to solve a power exponent. Through more than a problem solution, aims to cultivate students" ability to analyze and solve problems.
基金
陕西高等学校教学改革研究重点项目(No.13BZ56)
陕西省教育科学"十二五"规划课题(No.SGH12443
No.SGH140749)
商洛学院教育教学改革研究项目(No.13jyjx101
No.13jyjx120
No.14jyjx109)
关键词
幂指函数
等价无穷小
洛必达法则
Power Exponent Function
Equivalent Infinitesimal
L'Hospital