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Homework Help: Characteristic equation

  1. Apr 2, 2009 #1
    For the ODE x''+2x'+6x=sin2t
    what is the characteristic equation?
    Is it m^2+2m+6=0
    or m^2+2m+6=cos2t
     
  2. jcsd
  3. Apr 2, 2009 #2
    The first one.
     
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