答:
抛物线的焦点F(5,0),准线x=1
则焦距p=5-1=4
顶点横坐标x=1+p/2=1+2=3
顶点为(3,0)
所以:抛物线为y^2=2p(x-3)=8(x-3)
所以:抛物线为y^2=8(x-3)