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	Các bình luận về:  Cho \({\log _7}12 = x\), \(\,{\log _{12}}24 = y\), \({\log _{54}}168 = \frac{{a.xy + b}}{{cxy + dx}}\), với \(a,\,b,\,c,\,d\,\) là các số nguyên và \(\frac{c}{d}\) là phân số tối giản. Tính tổng \(T = \left&#124; {a + b + c + d} \right&#124;\) .	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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