Proof by Contradiction
What is proof by contradiction?
- A proof by contradiction assumes the opposite result is true
- Then, through a series of logical steps, shows that this cannot be so
How do I do proof by contradiction?
- This type of proof often involves explanation in words alongside mathematical statements
- Start with a statement assuming the opposite is true
- e.g. 'Assume...'
- Use prime factorisation to write a composite number as a product of primes
Worked Example
