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	Các bình luận về: Đề: Cho điểm \(M(1;4;2)\) và mặt phẳng \(\left( \alpha \right):\,x + y + z &#8211; 1 = 0\). Tìm tọa độ H là hình chiếu vuông góc của M trên mặt phẳng \(\left( \alpha \right)\).	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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