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Thread: integral by substitution!!

  1. May 25th 2012, 04:33 AM #1
    lawochekel
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    integral by substitution!!

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

    pls how do i go about the problem above, thanks
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  2. May 25th 2012, 04:48 AM #2
    biffboy
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    Re: integral by substitution!!

    Try sub u=x^2+4
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