I用定积分确定函数关系式摘要 定积分是微积分的一种，在高等数学中占有一定的地位。目前就高等数学而言，我们只要分析的是一元函数的积分学，其中主要包括定积分和不定积分两个方面。这里我们主要讨论一元函数的定积分在确定函数关系式方面的作用。关键词 定积分 函数 作用Using definite integral to determine function relationAbstract Fixed integral is a kind of calculus,which occupies a certain position in higher mathematics.At present,as far as higher mathematics is concerned,we mainly analyze the integral of univariate function,which mainly includes two aspects:definite integral and indefinite integral.Here we mainly discuss the function of definite integral of definite integral of univariate function in determining function relation.KEY WORDS Definite, Integral, Function Effect 1目 录摘要·········································ⅠAbstract…………………………………………………………………………………………Ⅰ目录……········································1引言··········································21 定积分和函数的定义··································21.1 定积分的定义··································31.2 函数的定义···································42 定积分和函数的关系··································42.1 积分第一中值定理································42.2 积分上限的函数·································63 方法探索·······································73.1 等式两边取积分，计算出积分值，代入原函数····················73.2 利用导数求解函数方程，两边求导，设原函数，代入原式，直接解出定积分，确认函数···········...
