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	Các bình luận về: Đề bài: Giả sử $x, y$ là các số thay đổi thỏa mãn: $x &gt; 0, y &gt; 0, x + y = 1.$Hãy tìm giá trị nhỏ nhất của biểu thức: $P = \frac{x}{\sqrt {1 &#8211; x} } + \frac{y}{\sqrt {1 &#8211; y} }$	</title>
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