答:
抛物线上点到焦点的距离等于其到准线的距离
所以:点M到准线的距离是a
抛物线y^2=2px的准线x=-p/2
则点M的横坐标x满足:x-(-p/2)=a
x=a+p/2
抛物线 y²=2Px.(P>0)上一点M到焦点的距离是a(a>p/2)则点M到准线的距离是 点M的横线坐标是
抛物线 y²=2Px.(P>0)上一点M到焦点的距离是a(a>p/2)则点M到准线的距离是 点M的横线坐标是
数学人气:780 ℃时间:2019-12-12 00:15:37
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