Homework Help: Eek! Integrals are ruining my life.

1. Sep 17, 2006

ashleyk

Hey I have a test soon and need help on two problems, please!!

first is taking the integral of (e^(x)^1/2)/(x)^(1/2) dx

second is taking the integral of 2/(x^2+4x+8) dx

thanks for any help!

2. Sep 17, 2006

mr_coffee

You have to at least show you attempted the problem(s) or the smart people won't want to help.

3. Sep 17, 2006

ashleyk

For the 1st one i am not sure where to start...

for the second one, i tried using partial fractions but i could not factor it

4. Sep 17, 2006

shmoe

When in doubt, try a substitution.

It has no real roots. Try completing the square and remember arctan.

5. Sep 18, 2006

dextercioby

Hint for the first

$$2 \frac{d}{dx} e^{\sqrt{x}} =\frac{e^{\sqrt{x}}}{\sqrt{x}}$$

Daniel.