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	Các bình luận về: Cho hàm số \(f(x) = \left\{ \begin{array}{l}{x^3} + x + 2\,\,\,{\rm{khi }}x &#060; 1\\x + 3\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{khi }}x \ge 1\end{array} \right.\). Tính tích phân \(\int\limits_0^{\frac{\pi }{2}} {f\left( {3{{\sin }^2}x &#8211; 1} \right)} \sin 2x{\rm{d}}x\).	</title>
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