pow:problem5s26
Problem 5 (due Monday, April 13)
Prove that \[\sum_{k=0}^{n}{3n\choose 3k }=\frac{2}{3}\left( 2^{3n-1}+(-1)^n\right). \]
The problem was solved by Levi Axelrod and Gerald Marchesi. Their solutions are similar to our in-house solution, which you can see in the following link Solution.
pow/problem5s26.txt · Last modified: by mazur