Suppose that the closed formula for a sequence is a polynomial formula of degree 4. What can you say about the formula for the sequence of partial sums?

A test question lists the first four terms of a sequence as 2, 4, 6, and 8 and asks for the fifth term. Show that the fifth term can be any real number a by finding the nth term of a sequence that has for its first five terms 2, 4, 6, 8, and a.

What is the fourth partial sun for the geometric sequence a1=18 and r=2

Use polynomial fitting to find a closed formula for the sequence -5, 1, 51, 187, 451, 885, .... am =