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我们知道,二次函数图象是一条具有对称性的抛物线,巧妙应用二次函数图象的对称性求点的坐标、求抛物线的对称轴、求抛物线的解析式可以起到化繁为简的作用,合理应用二次函数图象的对称点之间的坐标关系,还可以轻松解决有关二次函数中的等腰三角形、等腰梯形、圆等问题.
We know that the quadratic function image is a symmetrical parabola, clever use of the quadratic function of the symmetry of the image to find the coordinates of the axis of the parabola to find the parabolic parabolic analytic formula can play simplification Function, the rational relationship between the quadratic function image of the symmetry between the points, but also can easily solve the quadratic function of the isosceles triangle, isosceles trapezoid, circle and other issues.