MathDB

8 (Z2)

Part of 2005 QEDMO 1st

Problems(1)

A²+ab+b²

Source: QEDMO 2005

11/8/2005
Prove that if nn can be written as n=a2+ab+b2n=a^2+ab+b^2, then also 7n7n can be written that way.
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