\[\boxed{\mathbf{1021}\mathbf{\text{.\ }}Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \lbrack - 2;6\rbrack\ и\ \lbrack 3;8\rbrack\]
\[\lbrack 3;6\rbrack.\]
\[2)\ \lbrack 4;7\rbrack\ и\ (4;9\rbrack\]
\[(4;7\rbrack.\]
\[3)\ ( - \infty;4,5)\ и\ (3,6; + \infty)\]
\[(3,6;4,5).\]
\[4)\ ( - \infty;1,6)\ и\ \ (1,8; + \infty)\]
\[\varnothing.\]
\[5)\ \lbrack 6; + \infty)\ и\ \lbrack 7,2;\ + \infty)\]
\[\lbrack 7,2; + \infty).\]
\[6)\ ( - \infty; - 5,3\rbrack\ и\ ( - \infty; - 2,4)\]
\[( - \infty; - 5,3\rbrack.\]