Question

Rationalise the denominatou os

$1 \div \sqrt{2}$


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Answer 1

$\\ \bf\frac{1}{ \sqrt{2} } \\ \\ = \bf\frac{1}{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } \\ \\ \bf = \frac{ \sqrt{2} }{ {2}^{ \frac{1}{2} } \times {2}^{ \frac{1}{2} } } \\ \\ \bf = \frac{ \sqrt{2} }{ {2}^{ \frac{2}{2} } } \\ \\ \red{\sf= \sqrt{2}}$

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