Question

Resolva a inequação:
$|\frac{10n}{3 + 2n} - 5| \ \textless \ \frac{1}{10}$

Answer 1

Resposta:

| 10n/(3+2n) -5 | =1/10

tirando o módulo

10n/(3+2n) -5 = ± 1/10

a)

10n/(3+2n) -5=1/10  

10n/(3+2n) =51/10

100n=153+102n

n=-153/2

b)

10n/(3+2n) -5=-1/10

10n/(3+2n)=49/10

100n=147+98n

2n=147

n=147/2