抛物线y^2=4x的准线方程是多少

Question

如题所述

Answer 1

y^2=4x,2P=4,P=2,而,Y^2=2PX的准线方程为X=-P/2.P=2,则,y^2=4x的准线方程是:X=-2/2=-1本回答被提问者和网友采纳