分式型函数求极限的方法总结

Summary of Fraction Function Ultimate Method

对分式型函数求极限的方法进行总结,以x→x0和x→∞为例进行说明。对分式型函数而言,要先判断分母的极限,再判断分子的极限,要选择正确简单的做题方法,注意洛必达法则的使用条件。

The research summarizes the fraction function ultimate method,and explains through the example of x→x0 and x→∞.For fraction function,it is necessary to judge the extremity of the denominator first,and then judge the extremity of numerator.It is suggested to correctly select simple problem solving method,and pay attention to the service conditions of L’Hospital’s rule.