Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A really fundemental question.

  1. Oct 27, 2013 #1
    I am embarrassed to ask this question. I have seen PhD's not know the basic answer to questions. I have been humbled. Could someone help please. I am writing a paper and need the answer to a question.

    For the Fundamental Theorem for integrals of derivatives

    [itex]\int[/itex](DF(x)/dx)dx = [F(x)][itex]^{a}_{b}[/itex]

    I did not put in the limits on the first integral, too hard to use this system.

    If F(x) = Constant, does the Fundamental Theorem give a constant.

    I know the derivative is 0, but the equation I am using is at a min. for this constant, so it should give 0. The answer for x^2 is just x^2 but it is continuous and has a derivative. Questions always come up no matter what level you are at. Another PhD could not answer this. Call me a dummy, I do not care.

    Would the answer be a that Constant. I could not find the answer anywhere.
     
  2. jcsd
  3. Oct 27, 2013 #2

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    No, the answer for the definite integral is 0, for F(x)=constant.

    The ANTI-derivative of DF/Dx, for F(x)=constant is, however, F(x)+Constant.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook