Odredi sva realna rješenja sustava (1+4x2)y=4z2,(1+4y2)z=4x2,(1+4z2)x=4y2.\begin{aligned} (1 + 4x^2) y &= 4z^2, \\ (1 + 4y^2) z &= 4x^2, \\ (1 + 4z^2) x &= 4y^2. \end{aligned}(1+4x2)y(1+4y2)z(1+4z2)x=4z2,=4x2,=4y2.