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Math Help - Substitution of variables in Mathematica

  1. #1
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    Oct 2009
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    Substitution of variables in Mathematica

    I have the expression:
    (cx^2-c^3t^2)/6

    For which I am trying to substitute
    ct/x -> nu

    To get
    cx^2(1-nu^2)/6

    Can easily do this by hand, but how would you do this in Mathematica?
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  2. #2
    Super Member
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    Aug 2008
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    (c*x^2 - c^3*t^2)/6 /. t -> (x*nu)/c
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