\[\boxed{\mathbf{1246}\mathbf{\ (835)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 3,4 < x < 3,6\]
\[x = 3,45;\ \ 3,5;\ \ 3,55.\]
\[2)\ 0,527 < x < 0,528\]
\[x = 0,5275;\ \ 0,5277;\ \ 0,5279.\]
\[3)\ 2,003 < x < 2,00301\]
\[x = 2,003001;\ \ 2,003005;\ \ \]
\[2,003009.\]