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Math Help - integrate

  1. #1
    mms
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    integrate

    <br />
\int {\frac{x}<br />
{{\sqrt {x^2 - 1} }}} dx<br /> <br />

    thanks
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  2. #2
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    Quote Originally Posted by mms View Post
    <br />
\int {\frac{x}<br />
{{\sqrt {x^2 - 1} }}} dx
    substitution ... let u = x^2-1
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