# Homework Help: Improper Integral Confusion

1. Feb 28, 2010

### sinequanon

1. The problem statement, all variables and given/known data

$$\int(2dx/(x^2+4)$$
from x= -$$\infty$$ to x=2

2. Relevant equations

No specific ones.

3. The attempt at a solution

So, from there I tried to split the integral into two, integrating between 2 and -2, and -2 and -$$\infty$$, but I got very lost trying to take the limits for these, partly because I don't know what to set as the approaching variables in each case. And integrating the function actually is another issue. Could someone take a look?

Last edited: Feb 28, 2010
2. Feb 28, 2010

### rock.freak667

I think you need to integrate that over.

$$\int \frac{1}{x^2+4} \neq lnG(x)$$