Ответ:
\[a_{14} + a_{32} = 300\]
\[a_{1} + 13d + a_{1} + 31d = 300\]
\[2a_{1} + 144d = 300\]
\[a_{1} + 22d = 150 \Longrightarrow a_{23} = 150\]
\[Ответ:150.\]
\[a_{14} + a_{32} = 300\]
\[a_{1} + 13d + a_{1} + 31d = 300\]
\[2a_{1} + 144d = 300\]
\[a_{1} + 22d = 150 \Longrightarrow a_{23} = 150\]
\[Ответ:150.\]