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	Các bình luận về:  (THPT Lương Thế Vinh – Hà Nội – 2022) Trong không gian \(Oxyz\), cho hai điếm \(A(2; &#8211; 1; &#8211; 1),B(0;1; &#8211; 2)\) và mặt phắng \((P):2x + y &#8211; 2z &#8211; 2 = 0\). Điếm \(M\) thuộc mặt phắng \((P)\) sao cho \(\widehat {AMB}\) Ión nhất, khì đó \(\cos \widehat {AMB}\) bằng	</title>
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