Question

determine o valor de x na PG (1\2 , x, 9\8)

Answer 1

$\frac{\frac{1}{2}}{x}=\frac{x}{\frac{9}{8}}\\\\\ \frac{9}{8}\cdot\ \frac{1}{2} = x\cdot\ x\\\\\ x^2 = \frac{9}{16}\\\\\ x = \sqrt{\frac{9}{16}}\\\\\ \boxed{x = \frac{3}{4}}$