Question

es urgennteee,ayuden porfaa:!!!111!!

Answer 1

Respuesta:

$\frac{5}{2}$

Explicación paso a paso:

$a=0.3333...\\ 10a=3.3333...\\ 10a-a=3\\ 9a=3\\ a=\frac{3}{9} =\frac{1}{3} \\ \\ 10b=0.3333...\\ 100b=3.3333...\\ 100b-10b=3\\ 90b=3\\ b=\frac{3}{90} =\frac{1}{30} \\\\ b=c=\frac{1}{30} \\ \\ \frac{1}{\frac{1}{3}+\frac{1}{30}+\frac{1}{30} } =\frac{1}{\frac{10+1+1}{30} } =\frac{1}{\frac{12}{30} } =\frac{30}{12}=\frac{5}{2}$