Question

Quanto vale 1/Raiz de 2 - 1?

Answer 1

$\frac{1}{ \sqrt[]{2} - 1 } = \frac{1 \times (\sqrt[]{2} + 1) } { (\sqrt[]{2} - 1) \times (\sqrt[]{2} + 1)} = \frac{\sqrt[]{2} + 1}{2 - 1}$
$\frac{\sqrt[]{2} + 1}{1} = \sqrt[]{2} + 1$