How do you exactly start a report ab an overview of a job?

Formal business reports have important functions in helping managers and executives make decisions. These documents can have a variety of purposes depending on your needs and industry. Learning how to write a formal business report can help you develop as a professional. In this article, we explain what a formal business report is, how to write one and provide an example.

to answer your question:

f(x)= a^x.  if x=0, f(x)=1  if x=1, f(x)=a  if x=1, f(x)=a^a