\[\boxed{\text{558\ (558).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ k = 2,\ \ b = - 3;\]
\[\textbf{б)}\ k = 1,\ \ b = 0.\]
\[\boxed{\text{558.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[a_{n} = a_{1} + d(n - 1) =\]
\[= 32 - 1,5n + 1,5 =\]
\[= 33,5 - 1,5n.\]
\[\textbf{а)}\ a_{1} = 32;\ \ d = - 1,5;\ \ a_{n} = 0:\]
\[\ 33,5 - 1,5n = 0\]
\[n = 22\frac{1}{3} - не\ целое\ число \Longrightarrow\]
\[\Longrightarrow арифметическая\ \]
\[прогрессия\ не\ содержит\ 0.\]
\[\textbf{б)}\ a_{1} = 32;\ \ d = - 1,5;\ \ \]
\[a_{n} = - 28:\]
\[33,5 - 1,5n = - 28\]
\[1,5n = 61,5\]
\[n = 41\]
\[a_{41} = - 28.\]
\[Арифметическая\ прогрессия\ \]
\[содержит\ число\ a_{41} = - 28.\]