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	Các bình luận về: Trong không gian \(Oxyz\), cho đường thẳng \(d:\frac{{x &#8211; 1}}{2} = \frac{{y &#8211; 2}}{4} = \frac{{z &#8211; 3}}{1}\). Hình chiếu vuông góc của \(d\) trên mặt phẳng \(\left( P \right):x &#8211; y + 2z + 1 = 0\) là đường thẳng có phương trình	</title>
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