You should use the following definitions to answer the questions below. Please read them carefully. Definition (Rational number) A rational number is a number that can be expressed in the form of where a and b are integers and b is not 0. Definition (Irrational Number) An irrational number is a number that cannot be expressed in the form for any integers a and b. 2. Prove or disprove: If a is a rational number then its inverse is a rational number