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	Các bình luận về: Cho hàm số \(f(x) = \left\{ {\begin{array}{*{20}{l}}{{x^2} + x + 1}&#038;{{\rm{ khi }}x \ge 3}\\{2x &#8211; 1}&#038;{{\rm{ khi }}x &#060; 3}\end{array}} \right.\). Khi đó \(I = \int\limits_0^2 {xf\left( {{x^2} + 1} \right)} dx\)bằng	</title>
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