上海市二期课改新教材例题中研究过函数y=x+1/x的图像,它可以看作是我们非常熟悉的正比例函数y=x和反比例函数y=1/x的和.课本对于这个函数的性质和应用没有做太多的说明,但是它却有着基本的规律性和广泛的应用性,是近几年高考命题的热点之一,本文对函 The image of the function y=x+1/x has been studied in the Shanghai example of the second curriculum reform. It can be regarded as the sum of the positive proportion function y=x and inverse ratio function y=1/x which we are very familiar with. The nature and application of this function do not do much to explain, but it has a basic regularity and a wide range of applications, is one of the hot topics of the college entrance examination proposition in recent years, this article on the letter