Question

{2, 3, 7} ∪ {3, 7, 8}

Answer 1

`\lbrace3,7\rbrace`

Step-by-step 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