logarithmic functions and their graphs

Jul 2018
12
0
here
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
 

romsek

MHF Helper
Nov 2013
6,665
3,002
California
I guess what they are after is that $\log(abc) = \log(a)+\log(b)+\log(c)$

it's a standard property of logarithms
 
Jul 2018
12
0
here
Thank u, appreciate the help