指数函数是高中阶段在学习函数及其性质的基础上重点研究的函数之一.学习了指数函数后,常常会遇到比较指数式大小的一类问题.这类问题在各种考试中出现频率高、灵活性强,是考查指数函数性质的重要题型,且大多为选择题和填空题.掌握好比较指数式大小的方法,在比较对数大小时也会有很大帮助. The exponential function is one of the most important functions studied in the high school stage on the basis of the learning function and its properties. After learning the exponential function, we often encounter a class of questions that compare the size of the exponential type. The frequency of such questions in various examinations High and flexible, it is an important question to examine the nature of the exponential function, and most of them are multiple-choice questions and fill in blank questions. Having a good grasp of the method of comparing exponential sizes can be of great help when comparing the logarithm size.