Which of the following points lie on the parabola x2=4ay?
x=at2 ,y=2at
x=2at ,y=at2
x=2at2,y=at
x=2at,y=at2
Substituting x=2at,y=at2 in the given equation
(2at)2=4a(at2)
⇒4a2t2=4a2t2
Hence,(2at,at2) lies on the parabola x2=4ay