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Which statement correctly describes the main idea used in the proof that \(\sqrt{2}\) is irrational?

Answer and explanation

Correct answer: यदि \(\sqrt{2}=p/q\) हो, जहाँ \(p\) और \(q\) सहभाज्य हैं, तो \(p\) और \(q\) दोनों सम सिद्ध होते हैं।

Using contradiction, assume \(\sqrt{2}=p/q\) with \(p\) and \(q\) coprime. From \(p^2=2q^2\), \(p\) is even, and then \(q\) is also even, contradicting coprimality. Exam tip: identify the conclusion that both numerator and denominator share 2.

Related tags

Number SystemsIrrational NumbersSquare Root 2Proof By ContradictionCoprime IntegersProof Of Irrationality Of Square Root 2 And Square Root 3MathematicsClass 9 Mcq

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