Home of real teaching & learning
  • Full support for teachers
  • Focus on critical thinking
  • Engaging classroom activities
  • Integrated student eBook
  • Assessed tasks / qBank
  • Practice exam questions

The InThinking Guarantee: Our sites are written by expert practitioners and not by AI

See our AI policy

Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.

Don't miss out, find out!

5. Proof

HL 5.1 - Deductive proof and counterexamples HL 5.2 - Proof by contradiction HL 5.3 - Mathematical induction This unit covers the following (and more): ∎ Concept of deductive reasoning ∎ Deductive proof and examples ∎ Proving an identity; completing a RHS-LHS proof ∎ Disproving a mathematical statement with a counterexample ∎ Concept of a conjecture and its role in proof ∎ Proof by mathematical induction and worked...

Help