抛物线y=1/ax2的焦点坐标是
问题描述:
抛物线y=1/ax2的焦点坐标是
答
x^2 = ay = 2py
p = a/2
焦点(0, a/4)
抛物线y=1/ax2的焦点坐标是
x^2 = ay = 2py
p = a/2
焦点(0, a/4)