ohnomylove

Giai phương trình $(2x-1)3^{x}=2x+1$

$\left\{\begin{matrix} (x+1)(x^{2}+1)(x^{4}+1)=y^{7}+1 & & \\ (y+1)(y^{2}+1)(y^{4}+1)=x^{7}+1 & & \end{matrix}\right.$

$\left\{\begin{matrix} (x+1)(x^{2}+1)(x^{4}+1)=y^{7}+1 & & \\ (y+1)(y^{2}+1)(y^{4}+1)=x^{7}+1 & & \end{matrix}\right.$

$\left\{\begin{matrix} x^{2}+(\frac{y}{y+1})^{2}=\frac{5}{4} & & \\ y^{2}+(\frac{x}{x+1})^{2}=\frac{5}{4} & & \end{matrix}\right.$

Gỉai hệ phương trình $\left\{\begin{matrix} x^{2}+(\frac{y}{y+1})^{2}=\frac{5}{4} & & \\ y^{2}+(\frac{x}{x+1})^{2}=\frac{5}{4} & & \end{matrix}\right.$