Re: Fundamental theorem problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg49600] Re: Fundamental theorem problem*From*: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>*Date*: Sat, 24 Jul 2004 03:47:33 -0400 (EDT)*References*: <cdqqnb$km6$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

This does what you want: FullSimplify[Assuming[2*x^4 <= Pi, D[Integrate[Sec[t], {t, 1, x^4}], x]]] Steve Luttrell "Steven Jonak" <jonakst at gw.kirkwood.k12.mo.us> wrote in message news:cdqqnb$km6$1 at smc.vnet.net... > I input the command: D[Integrate[Sec[t],{t,1,x^4}],x] expecting to get > 4x^3 Sec[x^4] but instead got a fairly complicated result that doesn't > resemble what one would expect from the Fundamental Theorem of Calculus. > What am I doing wrong? Help! > > S Jonak > "Maintain an even strain." >