Giải các hệ phương trình sau:
a)$\left\{\begin{matrix} xy+y+z=0\\ yz+z+x=-1 \\ zx+x+y=0 \end{matrix}\right.$
b)$\left\{\begin{matrix} x^{2}=y+1\\ y^{2}=z+1 \\ z^{2}=x+1 \end{matrix}\right.$
c)$\left\{\begin{matrix} x^3+2xy^2+12y=0\\ 8y^3+x^2=12 \\ \end{matrix}\right.$
d)$\left\{\begin{matrix} 2x^3+3yx^2=5\\ y^3+6xy^2=7 \end{matrix}\right.$
e)$\left\{\begin{matrix} \sqrt{3x}+\frac{\sqrt{3x}}{x+y}=2\\ \sqrt{7y}-\frac{\sqrt{7y}}{x+y}=4\sqrt{2} \end{matrix}\right.$
f)$\left\{\begin{matrix} \sqrt{x-\sqrt{y}}=x-y-\sqrt{x+\sqrt{y}}\\ x^{2}=y^4+y \\ 3y\geq x\geq y\geq 0 \end{matrix}\right.$
b)http://diendantoanho...endmatrixright/
- doremon01 yêu thích