Let q be a natural number greater than 1 with the property that q divides a orq divides
Chapter 1, Problem 17(choose chapter or problem)
Let q be a natural number greater than 1 with the property that q divides a orq divides b whenever q divides ab. Prove that q is prime
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