Recall that a rational number is a number that can be written as a fraction
where a and b are integers and b ≠ 0. Homework Help ✎
In part (a) of problem 11‑17 you multiplied two rational numbers and your result was a rational number. Will that always be true? In other words, is the set of rational numbers closed under multiplication? Justify your answer.
In part (b) of problem 11-17 you divided two rational numbers and your result was a rational number. Are the rational numbers closed under division? Justify your answer.
Is this answer a rational number?
Use the same method as part (a).