# A really fundemental question.

1. Oct 27, 2013

### russelljbarry15

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

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

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. Oct 27, 2013

### arildno

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.