Use the definition of a logarithm to prove 
.Hint: Let 
and 
.Then, 
and 
.
Definitions:
Developing Country
Refers to a nation with a less developed industrial base and a lower Human Development Index relative to other countries.
Cell Phone Business
The industry involved in the manufacturing, distribution, and services related to mobile telephones and their operations.
Business Communication
The exchange of information and ideas between individuals within a corporation or between a company and its customers, aimed at achieving business goals.
Requests
Appeals or calls for something to be given or done.
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