💬 👋 We’re always here. Join our Discord to connect with other students 24/7, any time, night or day.Join Here!

# List the first five terms of the sequence.$a_1 = 2, a_2 = 1, a_{a+1} = a_n - a_{n-1}$

## \begin{aligned} a_{1} &=2 \\ a_{2} &=1 \\ a_{3} &=-1 \\ a_{4} &=-2 \\ a_{5} &=-1 \end{aligned}

Sequences

Series

### Discussion

You must be signed in to discuss.

Lectures

Join Bootcamp

### Video Transcript

Okay, This is supposed to be in plus one equals a n minus a and minus one. And the first terms, the first two terms in the sequence or given to us, we have a one is two. It too is one a three. We have to reference this recursive relation. So a three is acting as their hay and plus one, which means that our A N is acting as our eight two. This is in our and minus one is like the A one that we have here. Okay, so a three is a two minus a one. So one minus two, minus one and then the same thing for a four. A four is now going to be a three minus eight two. So a three is minus one. A two is minus one. So this gives us minus two in a five is a four minus. Hey, three a four is minus two and then a three is minus one. So minus minus one will make us be having one. This puts us at minus one. The first five terms are sequence

Sequences

Series

Lectures

Join Bootcamp