Arithmetic Sequence Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved. An arithmetic sequence is a sequence in which each term after the first is equal to the sum of the preceding term and a constant. If the list of letters shown above is an arithmetic sequence, which of the following must also be an arithmetic sequence?I. II. III. I only II only III only I and II II and III Review Answer