1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Eek! Integrals are ruining my life.

  1. Sep 17, 2006 #1
    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. jcsd
  3. Sep 17, 2006 #2
    You have to at least show you attempted the problem(s) or the smart people won't want to help.
  4. Sep 17, 2006 #3
    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
  5. Sep 17, 2006 #4


    User Avatar
    Science Advisor
    Homework Helper

    When in doubt, try a substitution.

    It has no real roots. Try completing the square and remember arctan.
  6. Sep 18, 2006 #5


    User Avatar
    Science Advisor
    Homework Helper

    Hint for the first

    [tex] 2 \frac{d}{dx} e^{\sqrt{x}} =\frac{e^{\sqrt{x}}}{\sqrt{x}} [/tex]

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

Similar Threads - Integrals ruining life Date
Double integration and bounds Monday at 3:55 PM
Integration problem using u substitution Monday at 1:02 PM
Improper integral convergence from 0 to 1 Saturday at 4:59 PM
Numerical/Analytical Solution to a Complex Integral Mar 6, 2018
Gambler's ruin Apr 8, 2016