N
nguyenlinhtrang94


Giải hệ:[tex]\left\{ \begin{array}{l} \frac{1}{\ sqrt{x}} +\frac{y}{x}=\frac{2sqrt{x}}{y} +2\\ y(sqrt{x^2 +1} -1)=sqrt{3+3x^2} \end{array} \right.[/tex]
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