Question

se 1/a + 1/b= 1/c, com a= 1/2 e b= 1/3, então quanto vale c?​

Answer 1

Resposta:

$a = \frac{1}{2} \: \: e \: \: b = \frac{1}{3} \\ \frac{1}{a} + \frac{1}{b} = \frac{1}{c} \\ \\ \frac{2}{1} + \frac{3}{1} = \frac{1}{c} \\ \\ \frac{5}{1} = \frac{1}{c} \\ c = \frac{1}{5}$