Решебник по алгебре и начала математического анализа 10 класс Колягин Задание 208

\[\boxed{\mathbf{208}.}\]

\[1)\ A = \left\{ a;b;c \right\};\ \ B = \left\{ a;b \right\}:\]

\[A \cap B = \left\{ a;b \right\};\]

\[A \cup B = \left\{ a;b;c \right\}.\]

\[2)\ A = \left\{ a;b;c \right\};\ \ B = \left\{ c;d \right\}:\]

\[A \cap B = \left\{ c \right\};\]

\[A \cup B = \left\{ a;b;c;d \right\}.\]

\[3)\ A = \left\{ a;b \right\};\ \ B = \left\{ \varnothing \right\}:\]

\[A \cap B = \left\{ \varnothing \right\};\]

\[A \cup B = \left\{ a;b \right\}.\]

\[4)\ A = \left\{ a \right\};\ \ B = \left\{ c;d;e \right\}:\]

\[A \cap B = \left\{ \varnothing \right\};\]

\[A \cup B = \left\{ a;c;d;e \right\}.\]