List the elements of the set.
-If $A = \{ x \mid x$ is an odd integer $\}$ and $B = \{ 51,53,54,56 \}$, list the elements of $A \cup B$.
A) { }
B) $\{ x \mid x$ is an odd integer $\}$
C) $\{ 51,53 \}$
D) $\{ x \mid x$ is an odd integer or $x = 54$ or $x = 56 \}$

Question

List the elements of the set.
-If $A = \{ x \mid x$ is an odd integer $\}$ and $B = \{ 51,53,54,56 \}$, list the elements of $A \cup B$.
A) {  }
B) $\{ x \mid x$ is an odd integer $\}$
C) $\{ 51,53 \}$
D) $\{ x \mid x$ is an odd integer or $x = 54$ or $x = 56 \}$

Quizplus · Accepted Answer

The union of two sets is the set of all elements that are in either set. So, $A \cup B$ is the set of all odd integers and all the elements of $B$. The only odd integers in $B$ are 51 and 53, so $A \cup B$ is the set of all odd integers or $x = 54$ or $x = 56$.

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