Question

Determine sabendo
log (8a+1)=2

Answer 1

Resposta:

log (8a+1)=2    é o mesmo que log₁₀ (8a+1)=2

log (8a+1)=2  

8a+1 =10²

8a=10²-1

8a=100-1

8a=99

a=99/8