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Alternating Sum of Squares Crossed Triangular Number Puzzle (Posted on 2023-06-24) Difficulty: 3 of 5
Is the expression given by:
n2 - (n-1)2+(n-2)2+.....+ (-1)n-2*22+(-1)n-1*12
a triangular number for every value of n?

Prove your assertion.

  Submitted by K Sengupta    
Rating: 5.0000 (1 votes)
Solution: (Hide)
For an explanation, refer to the solution submitted by Larry in this location.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionsolutionLarry2023-06-24 11:30:34
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