1. An infinite sequence beginning with a1 is a function. What is the domain of the function?
2. How do the two sequences differ?
(a) an = (-1)n / n
(b) an = (-1)n + 1 / n
3. Explain what is meant by a recursion formula.
4. Write a brief paragraph explaining how to identify the graph of an arithmetic sequence and the graph of a geometric sequence.