Re: calculate vertex of a parabola
- To: mathgroup at smc.vnet.net
- Subject: [mg112672] Re: calculate vertex of a parabola
- From: E. Pérez Herrero <enriqueperezherrero at gmail.com>
- Date: Sun, 26 Sep 2010 02:43:04 -0400 (EDT)
- References: <i7k4ch$lgl$1@smc.vnet.net>
(* The function *)
F[x_] :=a*x^2+b*x+c
(* Its derivative*)
D[F[x], x]
(* The vertex: *)
Solve[D[F[x], x] == 0, x]
(* Vertex coordinates*)
{x, F[x]} /. Solve[D[F[x], x] == 0, x]