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Re: Fundamental theorem problem


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."
>



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