If \(P\) is any point on the curve
\[
y^2=4ax,
\]
other than the origin, then the length of the subtangent at \(P\), \(y\)-coordinate of \(P\) and the length of the subnormal at \(P\) are in
Show Hint
For the parabola
\[
\boxed{y^2=4ax},
\]
at the point
\[
(at^2,2at),
\]
\[
\boxed{\text{Subtangent}=2at^2,\qquad
\text{Subnormal}=2a.}
\]
Compare these with the \(y\)-coordinate to identify the progression.