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At: sum difference

  n:f,g:(n), d:.
  sum(f(x)-g(x) | x < n) = d  sum(f(x) | x < n) = sum(g(x) | x < n)+d


By: Auto THEN RevHypSubstSq -1 0


Generated subgoal:

1 1. n : 
2. f : n
3. g : n
4. d : 
5. sum(f(x)-g(x) | x < n) = d
  sum(f(x) | x < n) = sum(g(x) | x < n)+sum(f(x)-g(x) | x < n)

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(3steps total) PrintForm Definitions Lemmas mb nat Sections MarkB generic Doc