Question

If A={s, t, a, r} and B={m, a, t, h}, find A ∩ B.

Answer 1

The given sets are

`\begin{gathered} A=\mleft\lbrace s,t,a,r\mright\rbrace \\ B=\mleft\lbrace m,a,t,h\mright\rbrace \end{gathered}`

The given question is

`A\cap B`

This means we need to list the comment elements in both sets

Since the common letters are t and a, then

`A\cap B=\mleft\lbrace a,t\mright\rbrace`