在学生学过“图形与变换”后,知道了一个图形经过平移、旋转等变换,其对应点的坐标之间,就形成了一定的对应规律,利用坐标间的这些对应规律,能够巧妙求出一些函数的表达式.对此,本文给出几例加以说明.一、利用轴对称的规律求函数的表达式 Students learned “graphics and transform ”, we know that a graphic after translation, rotation and other transformations, the corresponding point coordinates, formed a certain corresponding law, the coordinates of these correspondence between the law can be clever Find some functions of the expression. In this regard, this article gives a few examples to illustrate. First, the use of the law of axisymmetric to find the expression