Show that there exist a rational number a and an irrational number b such that ab is
Chapter 5, Problem 5.40(choose chapter or problem)
Show that there exist a rational number a and an irrational number b such that ab is rational.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer