[m]\left\{\begin {matrix}x-3 ≥0\\y-3=0\\y=ax\end {matrix}\right.[/m] или [m]\left\{\begin {matrix}x-3 ≥0\\ xy-3=0\\y=ax\end {matrix}\right.[/m]или [m]\left\{\begin {matrix}\sqrt{x-3}=0\\y=ax\end {matrix}\right.[/m]
О т в е т. [m]\frac{1}{3} ≤ a < 0[/m]