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	Các bình luận về: 80. Cho \(\int\limits_2^3 {\frac{1}{{x\left( {{x^2} &#8211; 1} \right)}}{\rm{d}}x}&#160; = \frac{{a\ln 2 + b\ln 3}}{2},\,\left( {a,\,b\, \in \mathbb{Z}} \right)\). Giá trị của \(S = 2a + 3b\) bằng	</title>
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