Show That the Set of Positive Rational Numbers with Denominators

question 49

Essay

Show that the set of positive rational numbers with denominators 3 or 5 is a countable set. (Rational
numbers are fractions with integers in the numerator and denominator.)

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Definitions:

Textbook

A book containing comprehensive coverage of a subject, often used for academic study and instruction.

Marginal Utility

The supplementary satisfaction or value derived from the consumption of one more unit of a good or service.

Lobster Dinner

A meal featuring lobster as the main course, often considered a luxury or special occasion dish.

Inelastic

Inelastic refers to a situation in economic terms where the demand or supply for a good or service is relatively unresponsive to changes in price, meaning the quantity demanded or supplied changes by a smaller percentage than the price change.