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Math Help - intergral

  1. #1
    Newbie
    Joined
    Nov 2008
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    intergral

    integrate
    x^3 +61/x^2+5x+4

    thanks
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  2. #2
    Senior Member
    Joined
    Nov 2008
    Posts
    461
    Hi man

    Quote Originally Posted by Lone21 View Post
    integrate
    x^3 +61/x^2+5x+4

    thanks
    I think you mean

     \int  \frac{x^3+61}{x^2+5x+4} dx


    Well, polynomial long division

    =>
    \int  \frac{x^3+61}{x^2+5x+4} dx

    = \int (\frac{1}{x + 4} + \frac{20}{x + 1} + x - 5) dx

    = LN(x+4) + 20*LN(x + 1) + \frac{x^2}{2} - 5x

    Any questions?


    Rapha
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