Recent content by dabdobber

well as far as the first one goes I know that the set of integers Z is a subset of Q and that Z is countable. now I make B as the set of all non-integral rational numbers. if B is countable, then Q is countable because a union of two countable sets is countable. that's my approach, but...

I need help with this math problem: Show that the set of rational numbers, Q, is countable. and Show that the set of irrational numbers is uncountable.