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	Các bình luận về: Đề: Trong không gian Oxyz, cho tứ diện ABCD trong đó \(A(2;3;1),{\rm{ }}B(4;1; &#8211; 2),{\rm{ }}C(6;3;7),{\rm{ }}D( &#8211; 5; &#8211; 4;8).\) Tính độ dài đường cao kẻ từ D của tứ diện. 	</title>
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