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Math Help - Indefinite integrals

  1. #1
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    Indefinite integrals

    ok these are solved
    Last edited by renn25; November 8th 2011 at 07:11 AM.
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    Re: Indefinite integrals

    Quote Originally Posted by renn25 View Post
    evaluate x/(x^4+x^2+1)
    evaluate x^2/ sqr( 1-x^2) dx
    evaluate tan^-1/x^2 dx

    these questions are slightly modified, they aren't the same question as the ones I need to do. I would just like to see these examples
    1. Complete the square then make a substitution.

    2. Use a trigonometric substitution.

    3. This is unreadable...
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    Re: Indefinite integrals

    ok thanks
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    Re: Indefinite integrals

    Quote Originally Posted by renn25 View Post
    evaluate x/(x^4+x^2+1)
    evaluate x^2/ sqr( 1-x^2) dx
    evaluate tan^-1x/x^2 dx

    these questions are slightly modified, they aren't the same question as the ones I need to do. I would just like to see these examples
    Are you sure the third one isn't \displaystyle \int{\frac{\tan^{-1}{x}}{1 + x^2}\,dx}?
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