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Text File  |  1993-11-07  |  451b  |  11 lines
  1. * sum                                                 external+internal
  2. sum(f,x,xmin,xmax)                                    external
  3. It evaluates the sum of f when x runs from xmin to xmax with the default
  4. step dx=1.
  5.  
  6. sum(f,x,xmin,xmax,dx)                                 internal
  7. It evaluates the sum of f when x runs from xmin to xmax with step dx.
  8.  
  9. See also: prod, list, table, infsum, partsum.
  10. e.g. sum(2^n,n,1,5,1.1), sum(x^n,n,1,5).
  11.