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Math Help - simplifying

  1. #1
    Newbie
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    simplifying

    hi, can someone please explain to me how they got from

     [\frac{s + n(\mu - \overline{Y})^2}{2}]^{-n/2}
    to
     [(1 + \frac{n(\mu - \overline{Y})^2}{s})(\frac{s}{2})]^{-n/2}


    coz i don't get it sorry
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  2. #2
    MHF Contributor

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    Quote Originally Posted by omgimsodumb View Post
    hi, can someone please explain to me how they got from

     [\frac{s + n(\mu - \overline{Y})^2}{2}]^{-n/2}
    to
     [(1 + \frac{n(\mu - \overline{Y})^2}{s})(\frac{s}{2})]^{-n/2}


    coz i don't get it sorry
    Most of that is "clutter". Think of it as \frac{s+ A}{2}. Factor out a "1/2": (s+ A)(\frac{1}{2})= (s+ \frac{As}{s})\frac{1}{2} and now factor out an "s": (1+ \frac{A}{s})\frac{s}{2}.
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