二次函数图像的对称轴、开口、顶点坐标怎么确定?_数学_作业_ ... 2009年2月14日 - 顶点式:y=a(x-h)^2+k [抛物线的顶点P(h,k)] 对于二次函数y=ax^2+bx+c 其顶点坐标 ...
Parabolas Parabolas. The graph of a quadratic equation in two variables (y = ax2 + bx + c ) is called a parabola. The following graphs are two typical parabolas their ...