\[Страница\ 22.\]
\[\boxed{\mathbf{16.}}\]
\[\textbf{а)}\ M \cup K = \left\{ a;b;c;x;y \right\}\]
\[\textbf{б)}\ K \cup P = \left\{ x;y;b;c \right\}\ \]
\[\textbf{в)}\ M \cup P = \left\{ a;b;c;x \right\}\]
\[\textbf{г)}\ M \cap K = \left\{ \varnothing \right\}\]
\[\textbf{д)}\ K \cap P = \left\{ x \right\}\]
\[\textbf{е)}\ M \cap P = \left\{ b;c \right\}\]
\[\boxed{\mathbf{17.}}\]
\[\textbf{а)}\ B \subset A \cup B\]
\[\textbf{б)}\ A \cap B \subset B\]
\[\boxed{\mathbf{18.}}\]
\[\boxed{\mathbf{19.}}\]
\[\textbf{а)}\ (A \cap B) \cup A = A\]
\[\textbf{б)}\ (A \cup B) \cap B = B\]