Question

Let $A=\{1,2\}$ and $B=\{2,3,4\}$.

If $B\times B=\left\{\right(2,2),(2,3),(2,4),(3,2),(3,3),(3,4),(4,2),(4,3),(4,4\left)\right\}$.

Please enter $1$ or else $0$.

Answer 1

Cartesian product of two sets is obtained by pairing each element of first set with each element of second set.
Hence, $B\times B=\left\{\right(2,2),(2,3),(2,4),(3,2),(3,3),(3,4),(4,2),(4,3),(4,4\left)\right\}$.