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If assuming √3 is rational breaks the coprime condition, which conclusion is correct?

Answer and explanation

Correct answer: √3 is irrational

For a contradiction proof, suppose √3 = m/n in lowest terms. Squaring gives m² = 3n², so the prime-factor rule implies that 3 divides m. Substituting m = 3k then shows that 3 also divides n, contradicting that m and n are coprime. Hence the rational assumption is impossible and √3 is irrational, so option B is correct.

Related tags

Number-SystemsProof-Of-IrrationalitySquare-Root-3Coprime-ConditionProof Of Irrationality Of Square Root 2 And Square Root 3Number SystemsMathematicsClass 9 Mcq

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