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Posted 2016-07-31, 07:48 PM in reply to WetWired's post starting "Wait! What an obtuse way to say that n..."
WetWired said: [Goto]
Wait! What an obtuse way to say that n choose k = n choose k or n choose n-k!

Why not just or even

Yes, my "formula" is just the result of using the identity repeatedly, followed by a little algebra:



I just thought the symmetry between the sum and product (and their upper limits) was fun.
"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram
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