论文部分内容阅读
二次函数y=ax2+bx+c(a≠0)的图象,是关于x=-b/2a成轴对称的抛物线,它的对称轴是直线x=-b/2a,利用它的对称性,常常能使求解变得简捷,优化解题过程.现举例说明.
The image of the quadratic function y=ax2+bx+c(a≠0) is an axisymmetric parabola about x=-b/2a, and its symmetry axis is a straight line x=-b/2a, using its symmetry Sexuality can often make the solution easy and optimize the problem solving process. Here is an example.