Chapter 1: Algebraic methods

Question 1

How can a rational number be represented?

Answer 1

a/b, where a and b are both integers.

Question 2

Steps of proof by contradiction

Answer 2

1. To prove a statement, by contradiction you start by assuming it is not true.
2. Then use logical steps to show that this assumption leads to something impossible (either contradiction of assumption or contradiction of a fact you know is true).