2.Оцініть значення виразу 2х-[latex] \frac{1}{9} [/latex] у: 1

2x-y/9<0 18x-y<0 y>18x y>0 при х∈(0;∞) y<0  при x∈(-∞;0)

[latex]2x- \frac{1}{9} y=2*(1\ \textless \ x\ \textless \ 3)- \frac{1}{9} *(3\ \textless \ y\ \textless \ 6)= \\ \\ =(2\ \textless \ 2x\ \textless \ 6)- (\frac{1}{3} \ \textless \ \frac{1}{9} y\ \textless \ \frac{2}{3}) =2- \frac{1}{3} \ \textless \ 2x- \frac{1}{9} y\ \textless \ 6- \frac{2}{3} = \\ \\ =2\frac{2}{3} \ \textless \ 2x- \frac{1}{9}y\ \textless \ 5 \frac{1}{3}[/latex]