Mathematics A-Level
disproof by counterexample
What disproof by counterexample means in Mathematics A-Level, as defined for WJEC.
Definition of disproof by counterexample
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Reference: WJEC
Disproves a universal conjecture "for all x, P(x)" by exhibiting a single specific value x₀ for which P(x₀) is false.
Topics that use disproof by counterexample
- Proof (AS Unit 1: Pure Mathematics A) (WJEC A-Level)
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Using disproof by counterexample in the exam
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