Proof - counter examples, proof by exhaustion and direct proof

This is the first video on proof for A Level Maths, covering disproof by counter example, proof by exhaustion and direct proof by deduction. I use a few examples of each, including expressions for odd/even numbers, consecutive integers and rational/irrational numbers. Enjoy! https://www.buymeacoffee.com/starfishmaths www.starfishmaths.com [email protected]