Question

If $A$ and $B$ are non-empty sets and either $A$ or $B$ is infinite, then $A\times B$ is ...$X$... Here, $X$ refers to

• A. infinite
• B. finite
• C. empty
• D. None of these

Answer 1

Answer: (C)

If $A$ and $B$ are non-empty sets and either $A$ or $B$ is an infinite set, then $A\times B$ is also infinite.