抛物线2y＾2＋5x＝0的焦点坐标和准线方程

2y^2+5x=0 → 2y^2=-5x → y^2=-(5/2)x-2p=-5/2 → p=5/4抛物线的焦点坐标为：F(-5/8,0)准线方程为：x=p/2 → x=5/8 x^2+8y=0 → x^2=-8y-2p=-8 → p=4抛物线的焦点坐标为:F(0,-2)准线方程为:y=p/2 → y=2...