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Math Help - Defining a function in mathematica

  1. #1
    Member
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    May 2008
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    171

    Defining a function in mathematica

    Hey guys, is there a possibility to write this function (in the pic) in mathematica?
    And if so, how can I do it?

    Thanks a lot.
    Assaf.
    Attached Thumbnails Attached Thumbnails Defining a function in mathematica-1.jpg  
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  2. #2
    Newbie
    Joined
    Mar 2010
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    The function could be defined thusly,

    Code:
    Needs["PhysicalConstants`"];
    
    Z[W_,d_]:=If[W/d<=1,
        (60 Pi/Sqrt[VacuumPermittivity]) Log[(8d/W)+(W/4d)],
        (120 Pi)/(Sqrt[VacuumPermittivity] (W/d+1.393+0.667 Log[W/d+1.444]))];
    This will use the units of Ampere*Second/Meter*Volt for epsilon.
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