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199

Part of 1951 Moscow Mathematical Olympiad

Problems(1)

MMO 199 Moscow MO 1951 1^3 + 2^3 +...+ n^3 a perfect square

Source:

8/7/2019
Prove that the sum 13+23+...+n31^3 + 2^3 +...+ n^3 is a perfect square for all nn.
number theoryPerfect Square