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Alternating Pascal (Posted on 2011-12-08) Difficulty: 2 of 5
Prove that for any row of Pascal's Triangle if you alternately subtract and add terms you always get 0.

Note: this is obvious for odd rows [1-3+3-1=0]
but not so obvious for even rows [1-4+6-4+1=0]

See The Solution Submitted by Jer    
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Some Thoughts re: Also true for pascal-like tables(spoiler) Comment 2 of 2 |
(In reply to Also true for pascal-like tables(spoiler) by Steve Herman)

Very nice.
  Posted by Ady TZIDON on 2011-12-09 10:03:53

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