教材必修1第二章[函数概念与基本初等函数Ⅰ]第三节[对数函数],有一张用计算器通过列表描点的方法作出的指、对数函数的图象(底a为2),指、对数函数图象无交点.大概是熟视无睹的缘故,我们常常误认为:当a>1时函数y=logax的图象与函数y=ax的图象无交点.真的是这样吗?答案是否定的.举个例子:当x=2时函数y=1.1x的图象与直线y Textbook compulsory 1 Chapter II [Function concepts and basic elementary functions Ⅰ] Section III [Logarithmic function], there is a calculator by means of a list of points drawn method, the logarithm function of the image (base a is 2) , Means that there is no point in the image of the logarithmic function, which is probably a result of ignorance. We often mistakenly believe that: when a> 1, the image of y = logax does not intersect with the image of y = ax. The answer is no. For example: when x = 2 y = 1.1x image and the line y