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Math Help - Integration by Substitution!

  1. #1
    Junior Member
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    Integration by Substitution!

    I don't know which of the factores to pick out as the "u"

    1. integral of e ^x/2

    2. integral of ln4xdx/x

    thanks!
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  2. #2
    Senior Member
    Joined
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    Quote Originally Posted by littlesohi View Post
    I don't know which of the factores to pick out as the "u"

    1. integral of e ^x/2

    2. integral of ln4xdx/x

    thanks!
    1. u = \frac{x}{2}

    2. u = \ln 4x
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