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Riya says that since a calculator displays \(\sqrt{2}\) as 1.414, \(\sqrt{2}\) is a rational number. What is the error in her reasoning?

Answer and explanation

Correct answer: कैलकुलेटर का मान सन्निकट होता है; \(\sqrt{2}\) का दशमलव प्रसार अनंत और अनावर्ती है।

A calculator shows 1.414 only as an approximation, not as the exact value. \(\sqrt{2}=1.414213\ldots\) is non-terminating and non-repeating, so it is irrational. Exam tip: never treat a rounded display as proof of rationality.

Related tags

Number SystemsIrrational NumbersSquare Root 2Decimal ExpansionMisconception AnalysisProof Of Irrationality Of Square Root 2 And Square Root 3MathematicsClass 9 Mcq

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