GHPT:
1.$\left\{\begin{matrix} x^{3}y-y^{4}=28 & \\ x^{2}y+2xy^{2}+y^{3}=18\sqrt{2} & \end{matrix}\right.$
2.$\left\{\begin{matrix} (1+x)(1+x^{2})(1+x^{4})=1+y^{7}(1) & \\ (1+y)(1+y^{2})(1+y^{4})=1+x^{7}(2) & \end{matrix}\right.$
3.$\left\{\begin{matrix} x+\frac{2xy}{\sqrt[3]{x^{2}-2x+9}}=x^{2}+y& \\ y+\frac{2xy}{\sqrt[3]{y^{2}-2y+9}}=y^{2}+x& \end{matrix}\right.$
4.$\left\{\begin{matrix} \frac{1}{\sqrt{1+2x^{2}}}+\frac{1}{\sqrt{1+2y^{2}}}=\frac{2}{\sqrt{1+2xy}} & \\ \sqrt{x(1-2x)}+\sqrt{y(1-2y)}=\frac{2}{9} & \end{matrix}\right.$
5.$\left\{\begin{matrix} 36x^{2}y-60x^{2}+25y=0 & \\ 36y^{2}z-60y^{2}+25z=0 & \\ 36z^{2}x-60z^{2}+25x=0 & \end{matrix}\right.$
6.$\left\{\begin{matrix} x+y+z=6 & \\ x^{2}+y^{2}+z^{2}=18 & \\ \sqrt{x}+\sqrt{y}+\sqrt{z}=4 & \end{matrix}\right.$
Bài viết đã được chỉnh sửa nội dung bởi minhdat881439: 30-06-2012 - 21:21