# Math Help - domain

1. ## domain

21. What is the domain of logc(log1/9 x)?

2. Originally Posted by rlarach
21. What is the domain of logc(log1/9 x)?
Do you mean $\log_c (\log_{1/9} x)$ ? Or $\log (c \log \frac{x}{9})$ ?

Please clarify - preferably using latex - or at least make very very clear what are the bases of the logs and what are just multipliers.