\[y = x^{5} - нечетная.\]
\[- 243 = ( - 3)^{5};\ \ \ \ \ \]
\[- 243 = - 243 \Longrightarrow A \in y.\]
\[32 = 2^{5};\ \ \ \ \ 32 = 32 \Longrightarrow B \in y.\]
\[32 = ( - 2)^{5};\ \ \ \ \]
\[32 \neq - 32 \Longrightarrow C \notin y.\]