Which of the following does not represent a function?

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?