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- sqrt(x) -> pierwiastek kwadratowy z liczby "x"
- sqrt(2) ^ -1 = 1 / sqrt(2)
- Wyłączamy pierwiastek z mianownika:
- (1 / sqrt(2)) * (sqrt(2) / sqrt(2)) = (1 * sqrt(2)) / (sqrt(2) * sqrt(2)) = sqrt(2) / 2
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