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MathMod Prelim 2 - Coggle Diagram

- - - - annuity certain
        
        The term of annuity certain begins and ends on definite dates.
      - perpetuity
        
        The term of a perpetuity begins on a definite date but never ends.
        
        The length of the term is infinite.
      - contingent annuity
        
        The term of contingent annuity begins on a definite date, but the ending date is not fixed in advance.
    - - ordinary annuity
        
        Periodic payments are made at the end of each payment interval.
      - annuity due
        
        Periodic payments are made at the beginning of each payment interval.
      - deferred annuity
        
        Periodic payments are made at the end of each payment interval.
        
        the term of an annuity does not begin until after a designated period of time.
    - - Simple Annuity
        
        The payment coincides with the interest compounding period
      - Complex Annuity or General Annuity
        
        The payment interval does not coincide with the interest compounding period.
- - - - B and k are positive constant
      - t >/= 0
  - - - B and k are positive constant
      - t >/= 0