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A student claims that \(\sqrt{3}=\frac{26}{15}\). Which of the following checks immediately proves that this claim is false?

Answer and explanation

Correct answer: \(26^2=676\), whereas \(3\times15^2=675\)

If \(\sqrt{3}=\frac{26}{15}\), squaring both sides would give \(26^2=3\times15^2\). But \(676\ne675\), so the claim is false. Exam tip: verify a claimed square root fraction by squaring it.

Related tags

Number SystemsIrrational NumbersSquare Root 3Error AnalysisRationality ProofProof Of Irrationality Of Square Root 2 And Square Root 3MathematicsClass 9 Mcq

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