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MathGroup Archive 2010

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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]



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