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At: sum difference 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)


By: RWO
Thm* n:f,g:(n).
Thm* sum(f(x) | x < n)+sum(g(x) | x < n) = sum(f(x)+g(x) | x < n)
0


Generated subgoal:

1   sum(f(x) | x < n) = sum(g(x)+f(x)-g(x) | x < n)
1 step

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