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- Disproof by counterexample is a mathematical technique used to show that a statement is false by finding a single example that contradicts the statement12345. It is the opposite of proving a statement is true, where we generally look for and develop logic to show it is true. To disprove a statement, we need just a single example that shows that the given statement is not true1.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Disproof by counterexample is opposite procedure than proving the statement is true. Whenever we try to prove a statement is true, we look generally to and develop logic to show it true. But whenever we are going to disproof any statement, we need just a single example, which shows that the given example is not true.alevelmaths.co.uk/pure-maths/proof/disproof-by-co…When trying to prove a statement is false, it is enough to find one example for which the statement does not hold true. This is called disproof by counter-example. Often it can be a question of trial and error until a counter-example is found.mathspanda.com/ASMa/Lessons/Disproof_by_cou…Disproof by counterexample is when we find one or more cases that demonstrate that a conjecture is incorrect. This is different to the rest of our proofs, as this is the only one that directly disproves a statement.www.studysmarter.co.uk/explanations/math/pure-m…(Disproof by Counterexample) To disprove the universal statement means to find an x such that ∀x, P (x) → Q(x) P (x) is true, but Q(x) is false. In notation, ∃x, P (x)∧ ∼ Q(x). We call such an x a counterexample.faculty.up.edu/wootton/Discrete/Section3.1.pdfDisproof by counterexample is the mathematical technique whereby a statement is shown to be false by finding a single example that contradicts the statement. For example, the statement all prime numbers are odd is immediately proved false by the fact that 2 is a prime number and is also even.abalulueducation.co.uk/a-level/maths/disproof-by-c…
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