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	Các bình luận về: Cho hàm số \(f\left( x \right)\) thỏa mãn \( &#8211; xf&#8217;\left( x \right).\ln x + f\left( x \right) = 2{x^2}{f^2}\left( x \right),\,\,\forall x \in \left( {1; + \infty } \right)\), \(f\left( x \right) &#062; 0,\forall x \in \left( {1; + \infty } \right)\)và \(f\left( {\rm{e}} \right) = \frac{1}{{{{\rm{e}}^2}}}\). Tính diện tích \(S\)hình phẳng giới hạn bởi đồ thị \(y = xf\left( x \right),y = 0,x = e,x = {e^2}\).	</title>
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