Let $$\begin{array} { l }
U = \{ 1,2,3,4,5,6,7 \} \
A = \{ 1,2,4,5 \} \
B = \{ 1,2,3,6 \} \
C = \{ 4,6,7 \}
\end{array}$$ List all the members of the set. $A \cup B$
A) $\{ 1,2,3,6 \}$
B) $\{ 1,2,4,5 \}$
C) $\{ 1,2 \}$
D) $\{ 1,2,3,4,5,6 \}$
E) $\varnothing$

Question

Let $$\begin{array} { l } 
U = \{ 1,2,3,4,5,6,7 \} \
A = \{ 1,2,4,5 \} \
B = \{ 1,2,3,6 \} \
C = \{ 4,6,7 \}
\end{array}$$ List all the members of the set. $A \cup B$
A) $\{ 1,2,3,6 \}$
B) $\{ 1,2,4,5 \}$
C) $\{ 1,2 \}$
D) $\{ 1,2,3,4,5,6 \}$
E) $\varnothing$

Quizplus · Accepted Answer

The union of sets A and B, denoted as $A \cup B$, includes all elements that are in A, in B, or in both. Therefore, $A \cup B = \{ 1,2,4,5 \} \cup \{ 1,2,3,6 \} = \{ 1,2,3,4,5,6 \}$.

Let U={1,2,3,4,5,6,7}A={1,2,4,5}B={1,2,3,6}C={4,6,7}\begin{array} { l } U = \{ 1,2,3,4,5,6,7 \} \\A = \{ 1,2,4,5 \} \\B = \{ 1,2,3,6 \} \\C = \{ 4,6,7 \}\end{array}U={1,2,3,4,5,6,7}A={1,2,4,5}B={1,2,3,6}C={4,6,7}​

Let $\begin{array} { l } U = \{ 1,2,3,4,5,6,7 \} \\A = \{ 1,2,4,5 \} \\B = \{ 1,2,3,6 \} \\C = \{ 4,6,7 \}\end{array}$