1. Not finding help here? Sign up for a free 30min 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!

Integrate sqrt problem

  1. Sep 6, 2005 #1
    Ok, I've been doing work for about 4 hours straight and I think my brain is fried. I know this is easy, it is just not working in my head.

    Anyway, the problem is this:

    Integrate the sqrt(4x) + sqrt(4x) on the interval 0 to 1

    I get, (8^3/2)/3 + (8^3/2)/3 but apparently this is not right. I'm probably forgetting something I'll hit myself in the head for :cry:. Any help though?


    PS: This is not homework.
  2. jcsd
  3. Sep 6, 2005 #2
    I'm sorry, but I'm having trouble seeing what the problem is. Did you mean [itex]\int_{0}^{1}\left(\sqrt{4x}+\sqrt{4x}\right)dx[/itex]? That's what it looks like. If so, you can simplify before integration.
  4. Sep 6, 2005 #3
    Yep, that's the one.

    [itex]2\int_{0}^{1}\left(\sqrt{4x}\right)dx[/itex] (Is this the simplified form?)
    Last edited: Sep 6, 2005
  5. Sep 6, 2005 #4
    Alright, you can take the square root of 4. Now you have the following:


    Yes, you simplified correctly.
    Last edited: Sep 7, 2005
  6. Sep 6, 2005 #5
    Ahh, I see what I did I think. I think I tried to just throw out the 1 and ended up with (8^(3/2))/3

    Thanks for the help!
    It's hard to stop from taking shortcuts! Argh! :redface:
    Last edited: Sep 6, 2005
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Integrate sqrt problem
  1. Integrate sqrt problem (Replies: 2)