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-Sqrt[1 + KE la + KE s + KE la s - Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]]*
(1 - KE la + KE s -  KE la s + Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]) -
(-1 + KE la - KE s + KE la s + Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]) *
Sqrt[1 + KE la + KE s + KE la s + Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]] == 0

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Solve[-Sqrt[
      1 + KE la + KE s + KE la s -
       Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]]*(1 - KE la +
      KE s - KE la s +
      Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]) - (-1 + KE la -
      KE s + KE la s + Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2])*
    Sqrt[1 + KE la + KE s + KE la s +
      Sqrt[4 KE la + (1 + KE s - KE la (1 + s))^2]] == 0, s]
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2Â¥2014-07-03 17:59:39
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