# [Something descriptive here will yield more responses]

1. Aug 23, 2008

### Yiping

I try to find the solution of the integrals below for more than a week.
$$\int_{p>0}^{\infty}\frac{\exp[-ap]}{p}dp$$
can anyone give me a hint about how to solve it?

2. Aug 23, 2008

### CompuChip

$$e^{-a p}$$ is continuous on ]0, 1] and therefore bounded (it lies between m and M). So you can estimate it to this constant and then on ]0, 1] the integral diverges logarithmically ($\displaystyle\propto \int_0^1 dp/p$). Furthermore, the integrand is positive on ]1, infinity[ so the end result also diverges.

That is definitely true...

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook