# Math Help - Logs

1. ## Logs

I understand what a logarithm is, I just can't put it to practice. When a question says "Express the following in terms of log a, log b, log c', what exactly does that mean?

Say for a question like log abc

All I see is abc to the base of 10. How do I express that?
______

Then what does "Simplify the following; write as a single log" mean?

Say for log 60 - log 4

I don't think I can go log (60-4), that doesn't seem right.

Sorry for the big question, exams are coming up D:

2. Originally Posted by RAz
I understand what a logarithm is, I just can't put it to practice. When a question says "Express the following in terms of log a, log b, log c', what exactly does that mean?

Say for a question like log abc

All I see is abc to the base of 10. How do I express that?
Recall that $\log(uv)=\log(u)+\log(v)$

Do you think you can attempt this now? (You will need to apply this property twice)

Then what does "Simplify the following; write as a single log" mean?

Say for log 60 - log 4

I don't think I can go log (60-4), that doesn't seem right.

Sorry for the big question, exams are coming up D:
Recall that $\log(a)-\log(b)=\log\left(\frac{a}{b}\right)$

Do you think that you can attempt this now?

3. Thankyou Chris, you're a lifesaver. Should I google "log terms/expressions/functions" for an entire list?

edit: should I study this http://www.purplemath.com/modules/logrules.htm

4. Or you can just take a look at here.