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	Các bình luận về:  (Chuyên Lam Sơn 2022) Cho hàm số \(y = f(x)\) liên tục trên đoạn \(\left[ {0;\frac{\pi }{2}} \right]\) thỏa mãn\(2\cos x \cdot f(1 + 4\sin x) &#8211; \sin 2x \cdot f(3 &#8211; 2\cos 2x) = \sin 4x + 4\sin 2x &#8211; 4\cos x,\forall x \in \left[ {0;\frac{\pi }{2}} \right]\)\(\)Khi đó \(I = \int_1^5 f (x)dx\) bằng	</title>
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