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	Các bình luận về: Trong không gian $Oxyz$, cho tam giác $ABC$ có $A(3; 3; 5)$, $B(1; 2; 3)$ và $C(-3; 6; 5)$. Tọa độ chân đường phân giác trong góc $B$ của tam giác $ABC$ là	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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