`1, 3, 1, 3, 1, 3, 1` Write an expression for the apparent nth term of the sequence. (assume that n begins with 1)

Expert Answers

An illustration of the letter 'A' in a speech bubbles

Let us start with the sequence `-1,1,-1,1,-1,1,...` The `n`th term of this sequence is `(-1)^n` (for odd `n` we get `-1` while for even `n` we get `1`) If we add `2` to each term of this sequence we get 


which is exactly our sequence. Therefore, the `n`th term of our sequence is




` `

See eNotes Ad-Free

Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.

Get 48 Hours Free Access
Approved by eNotes Editorial Team