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高三总复习已进行了一段时间.一天,我在做练习时遇到下题:a>1,y=a2与其反函数的图象()A.没有交点B.有且只一个交点C.有且只有两个交点D.至多有两个交点我思考:根据反函数的性质,若a>y,y=ax与其反函数的图象有交点,交点个数少于3个,则a>1,y=ax的图象与直线y=x必有交点,且它们的交点相同.试着解方程ax=x,结果无从下手;又试着画函数图象,还是一筹莫展.请教老师,老师提示:取特
A total review of high school has been for some time one day, I encountered the following questions in the exercise: a, 1, y = a2 and its inverse function of the image () A. No intersection B. There is only one intersection C. There And only two points of intersection D. There are at most two points of intersection I think: According to the nature of the inverse function, if a> y, y = ax has an intersection with the image of its inverse function, the number of intersection points is less than 3, then a> 1 , y = ax image and the line y = x must have the intersection point, and their intersection is the same. Try to solve the equation ax = x, the result can not start; try to paint the function image, or do nothing. Consult the teacher, the teacher prompts : Special