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	Các bình luận về: Đề bài: Cho tam giác $ABC$ có số đo ba cạnh là $a, b, c$ và chu vi $2p$. Giả sử  $ c \le b \le a $. Chứng minh rằng:  $p^2 \le \frac{9}{4}ab. $	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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