A pretty binomial identity
نویسندگان
چکیده
منابع مشابه
A Pretty Binomial Identity
Elementary proofs abound: the first identity results from choosing x = y = 1 in the binomial expansion of (x+y). The second one may be obtained by comparing the coefficient of x in the identity (1 + x)(1 + x) = (1 + x). The reader is surely aware of many other proofs, including some combinatorial in nature. At the end of the previous century, the evaluation of these sums was trivialized by the ...
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ژورنال
عنوان ژورنال: Elemente der Mathematik
سال: 2012
ISSN: 0013-6018
DOI: 10.4171/em/189