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A student calls \(\sqrt{2}\) irrational after seeing its decimal form 1.414213... . Which property must be proved to justify the conclusion?

Answer and explanation

Correct answer: Non-terminating and non-repeating

A rational number has a terminating or repeating decimal expansion. Hence \(\sqrt{2}\) must be non-terminating and non-repeating. Exam tip: many displayed digits alone are not proof.

Related tags

Irrational NumbersDecimal ExpansionSquare Root 2Number SystemsProof By ContradictionProof Of Irrationality Of Square Root 2 And Square Root 3MathematicsClass 9 Mcq

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