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Junior problems - AwesomeMath...Junior problems J469. Letaandbbedistinctrealnumbers. Provethat (3a+1)(3b+1)=3a2b2 +1 ifandonlyif −3 a+3 b‘ 3 =a 2b: ProposedbyAdrianAndreescu,UniversityofTexasatAustin,USA
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