在教学函数时,有这样一个问题:函数y=2~x与y=x~2图象的交点个数为()A.1B.2C.3D.以上都不对这是一个指数函数与幂函数图象的交点问题.大多数学生通过画草图得出第一象限和第二象限各有一个交点,选B.其实上面两个函数图象在第一象限内有两个交点(2,4)、(4,16),正确答案应为C.这说 In the teaching function, there is such a problem: the number of intersection of y = 2 ~ x and y = x ~ 2 images is () A.1B.2C.3D. None of the above is an exponential function and power function The intersection of the image of the problem.Most students draw a sketch of the first quadrant and the second quadrant each have a point of intersection B. Select B. In fact, the above two function images in the first quadrant have two points of intersection (2,4) , (4,16), the correct answer should be C. This said