Re: Fundamental theorem problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg49618] Re: Fundamental theorem problem*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Sat, 24 Jul 2004 03:48:42 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 7/23/04 at 6:01 AM, jonakst at gw.kirkwood.k12.mo.us (Steven Jonak) wrote: >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! I don't think you are doing anything wrong. Mathematica 5.0 by default attempts to give all of the conditions needed to make the result of Integrate valid. I suspect this is what you are seeing. This characteristic can be disabled by using GenerateConditions->False. So, if you do D[Integrate[Sec[t],{t,1,x^4},GenerateConditions->False],x]//Simplify you will get the result you were expecting. -- To reply via email subtract one hundred and four