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	Các bình luận về: .  Có tất cả bao nhiêu cặp số \(\left( {a;b} \right)\)với \(a,b\) là các số nguyên dương thỏa mãn:



\({\log _3}\left( {a + b} \right) + {\left( {a + b} \right)^3} = 3\left( {{a^2} + {b^2}} \right) + 3ab\left( {a + b &#8211; 1} \right) + 1\).	</title>
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