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!

Help with integral

  1. Sep 12, 2004 #1
    [tex] \int \frac {x}{\sqrt{3-x^4}}\mbox{dx}[/tex]

    Basically I haven't had any luck with anything I have tried. It almost looks like a trig substitution, but I don't know how to deal with the x^4 under the radical. Also, I would rather have a hint as to where to start rather than have the whole problem done for me.


    -Thanks, Erik
     
  2. jcsd
  3. Sep 12, 2004 #2

    Pyrrhus

    User Avatar
    Homework Helper

    Deal it as [tex] (x^2)^2 [/tex]
     
  4. Sep 12, 2004 #3

    Tide

    User Avatar
    Science Advisor
    Homework Helper

    I think that's going to turn into an incomplete beta function.
     
  5. Sep 12, 2004 #4
    I'm not sure what this means, but this problem is from calc II, and the text specifically says there are answers to all of the questions from the section this was taken from.

    Thanks. I am prety sure I can do this with trig substituion now, but if I can't I will let you know.


    -Thanks, Erik
     
  6. Sep 12, 2004 #5

    Tide

    User Avatar
    Science Advisor
    Homework Helper

    Right! I didn't look at it long enough. It's going to be an arcsin with an x^2 in the argument.
     
  7. Sep 13, 2004 #6

    Pyrrhus

    User Avatar
    Homework Helper

    Read Tide's post he gave it away :smile:
    No need for trigonometric substitution.

    Hint!
    [tex] u = x^2 [/tex]
    [tex] \frac{du}{2}= xdx [/tex]
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Help with integral
  1. Integral Help (Replies: 3)

  2. Help with Integral (Replies: 3)

  3. Integration Help (Replies: 2)

  4. Help with Integration (Replies: 1)

  5. Help integrating (Replies: 4)

Loading...