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	Các bình luận về: Cho hàm số\(y = f\left( x \right)\)liên tục trên \(\mathbb{R}\backslash \left\{ {0;\,\, &#8211; 1} \right\}\) thỏa mãn \(\left\{ \begin{array}{l}f\left( 1 \right) =&#160; &#8211; 2\ln 2\\f\left( 2 \right) = a + b\ln 3;\,\,a,\,b \in \mathbb{Q}\\x\left( {x + 1} \right).f&#8217;\left( x \right) + f\left( x \right) = {x^2} + x\end{array} \right.\).



Tính \({a^2} + {b^2}\).	</title>
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