Question

let U =(1,2,3,4,5,6,7), A=(1,2,3,4), and B=(1,2,6) find the set A an upside looking you thing B

Answer 1

\(\bf \large A\cap B\quad ?\)

Answer 2

\(\bf A\cap B\\
\quad \uparrow \\
intersect\implies \textit{the elements found in A that are also in B}\)