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Apr 23rd, 2018
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  1. Series[(1 - Sqrt[1-4z])/2, {z, 1/4, 1}]
  2.  
  3. 1/2 - I Sqrt[1-4z] + O[z-1/4]^(3/2)
  4.  
  5. (1/2 - 1/2 Sqrt[1-4z]) + O[z-1/4]^2
  6.  
  7. SeriesCoefficient[(1 - Sqrt[1-4z])/2, {z, 1/4, 0}]
  8.  
  9. SeriesCoefficient[(1 - Sqrt[1-4z])/2, {z, 1/4, 1/2}]
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