$\dfrac{1}{\sqrt{2}}$ rationalised is

$\dfrac{1}{\sqrt{2}}$ rationalised is
  1. $\dfrac{\sqrt{2}}{2}$
  2. $\dfrac{1}{2}$
  3. $\sqrt{2}$
  4. $\dfrac{\sqrt{2}}{4}$

Solution

Multiply numerator and denominator by $\sqrt{2}$.

Asked in: MH-SSC-9

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