Mathematics Homework Solutions
#251031
Prove that Binomial[2n, n] = Sum from k=0 to n of Binomial[n,k]^2
Prove that (2n choose n) = the sum from k=0 to n of (n choose k) squared.
We give cimbinatiorial proof of the identity Binomial[2n, n] = Sum from k=0 to n of Binomial[n,k]^2
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