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If (0<a<1) and (a) is rational, when will (\sqrt{a}) definitely be rational?

Answer and explanation

Correct answer: When (a) can be written as a ratio of two perfect squares

Step 1: The square root of a rational fraction is rational when both numerator and denominator can be perfect squares. Step 2: For example, (\sqrt{\frac{4}{9}}=\frac{2}{3}), so a ratio of two perfect squares is a safe condition. Step 3: Being positive or less than (1) does not guarantee a rational square root.

Related tags

Rational FractionsSquare RootIrrational NumbersClass 10Real NumbersMathematicsClass 10 Mcq

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