Question

log 3 [log5 (x+ 7)]= 1​

Answer 1

Assunto: equaçao logarítmica

• sendo:

 log3(log5(x + 7)) = 1

• reescrever e simplifique:

 log3(log5(x + 7)) = log3(3)

 log5(x + 7) = 3

• reescrever e simplifique:

 log5(x + 7) = log5(5^3)

 log5(x + 7) = log5(125)

• reescrever e simplifique:

 x + 7 = 125

 x = 125 - 7

 x = 118