Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1995
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1995

[Date Index] [Thread Index] [Author Index]

Search the Archive

Why gives Plot[GTK,{q,o,30}] negat. min. at q=15 ? (GTK:=1/3 q^2 - 10 q + 100)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg2244] Why gives Plot[GTK,{q,o,30}] negat. min. at q=15 ? (GTK:=1/3 q^2 - 10 q + 100)
  • From: txp at pi.net (JanHolland)
  • Date: Wed, 18 Oct 1995 01:54:59 -0400
  • Organization: txp

Hello,

Say  ATC = Average Total Cost := 1/3 q^2 - 10 q + 100

When I give Plot[ATC,{q,0,30}] the resulting graph gives a minimum
below the X-axis at about q=15

When I give q=15 and N[ATC] it evaluates correctly to GTK=25.

Does anyone know what am I doing wrong ?  Thanks for any effort you
take !

------------- GMT 16.15
Jan Holland
-----------
Jan Holland
txp at pi.net
"A fact is a broken dream"



  • Prev by Date: Problems loading packages in 2.2.4 for Win
  • Next by Date: Problems with Mathmetica and Solaris2.4
  • Previous by thread: Why gives Plot[GTK,{q,o,30}] negat. min. at q=15 ? (GTK:=1/3 q^2 - 10 q + 100)
  • Next by thread: Solid Geometry Problem