Question

hallar el promedio armonico de 3, 9 y 12​

Answer 1

Explicación paso a paso:

$\frac{3}{ \frac{1}{3} + \frac{1}{9} + \frac{1}{12} } = \frac{3}{ \frac{9 + 3}{27} + \frac{1}{12} } = \frac{3}{ \frac{12}{27} + \frac{1}{12} } \\ \\ \frac{3}{ \frac{144 + 27}{324} } = \frac{3}{ \frac{171}{324} } = \frac{972}{171} = 5.684$