在初中,学习了一次函数、反比例函数与二次函数.在高中,又学习了指数函数、对数函数与三角函数等.对这些常见的函数的图象的交点个数是值得探究的.但是在教学中发现,对其中几对函数的图象的交点情况,有些同学仅凭直观就作出判断,往往得出错误的结论,兹列举如下.一、函数y=x2与y In junior high school, learning a function, inverse function and quadratic function.In high school, also learned exponential function, logarithm function and trigonometric function, etc. The number of these common function image is worth exploring, but In teaching, it is found that some of the pairs of functions of the image of the intersection point, some students make judgments by intuition alone, often come to the wrong conclusion, it is listed as follows: First, the function y = x2 and y