Assignment:
Show that Q(set of rational numbers) ~ N(set of natural numbers).
(Suggestion from my professor: prove by letting set Qn < Q and a/b (a and b are some integers, but b is not zero) and Q = union of Qn (Qn = Q1, Q2, Q3, ....) .)
Provide complete and step by step solution for the question and show calculations and use formulas.