Question

{2, 3, 7} ∪ {3, 7, 8}

Answer 1

$\lbrace3,7\rbrace$

Explanation

The union of two sets is a set containing all elements that are in A or in B (possibly both)

hence

to find the answer we need to check the elements present inboth sets,

Step 1

Let

$\begin{gathered} A=\lbrace2,3,7\rbrace \\ B=\lbrace3,7,8\rbrace \end{gathered}$

hence

$\begin{gathered} A\cup B=\lbrace3,7\rbrace \\ \end{gathered}$

therefore, the answer is

$\lbrace3,7\rbrace$

I hope this helps you