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	Các bình luận về: Đề bài: Cho hàm số $f$ có đạo hàm liên tục trên $[a,b]$ và $f(a)=0$Chứng minh rằng: $[\mathop {Max&#124;f(x)&#124;}\limits_{x\in [a,b]} ]^{2}\leq (b-a)\int\limits^{b}_{a}[f(x)]^{2}dx$	</title>
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