What is the difference between a service contract and a warranty?  

service contract is a business agreement between a contractor and customer covering the maintenance and servicing of equipment over a specified period.warranty is a written guarantee, issued to the purchaser of an article by its manufacturer, promising to repair or replace it if necessary within a specified period of time.

A service contract is sometimes called an “extended warranty,” but service contracts are not warranties. A service contract can help you fix or maintain your product for a specific time — like a warranty. But, unlike a warranty, service contracts cost extra. ... Auto service contracts are different

answerequity law;

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