# Thread: logarithmic functions and their graphs

1. ## logarithmic functions and their graphs

The problem: Choose 2 numbers and add their common logarithms. Then find the common logarithm of the product of those 2 numbers. What do you observe? Does it work for 3 numbers?

What I know: common logarithms use base-10.

What I think I know: a logarithm is an exponent.

I don't know how to parlay my limited knowledge into a solution, please help

2. ## Re: logarithmic functions and their graphs

I guess what they are after is that $\log(abc) = \log(a)+\log(b)+\log(c)$

it's a standard property of logarithms

3. ## Re: logarithmic functions and their graphs

Thank u, appreciate the help