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Homework Help: Separation of variables

  1. Jun 19, 2011 #1
    Im doing separation of variables now and im stuck....ive come up to this stage

    -5 ln 2-3i = t^2/2 + C

    my problem is do i need to divide the C and t^2/2 by -5? or dont divide the C?

    plz help me..
    thnks
     
  2. jcsd
  3. Jun 19, 2011 #2

    hunt_mat

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    You need an initial condition.
     
  4. Jun 19, 2011 #3
    sorry i dont get it...im trying to make the general solution......from the question i(0) = 12
     
  5. Jun 19, 2011 #4

    hunt_mat

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    So setting t=0 shows that -5ln|2-3*i(0)|=C=> -5ln|2-36|=C=>-5ln(34)=C, so substitute this into your equation.
     
  6. Jun 19, 2011 #5
    ok thanks for the help
     
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