Practice figuring out the sum of finite arithmetic series.

Problem

sum, start subscript, k, equals, 1, end subscript, start superscript, 800, end superscript, left parenthesis, minus, 8, k, plus, 109, right parenthesis, equals
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i