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Formulas related to progressions

  1. Jul 16, 2004 #1
    I need all formulas related to progressions...AP,GP,HP...all the formulas to find the sum of these progressions..Please i need it immediately
  2. jcsd
  3. Jul 16, 2004 #2
    try deriving them.
  4. Jul 16, 2004 #3


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