Let’s start our work on algebra by looking at some **sequences**.

First of all what is a sequence?

Now let’s try to work out the following numbers in some of these **infinite** sequences:

2, 4, 6, 8, …

3, 10, 17, 24, …

9, -1, -11, -21, …

1, 4, 9, 16, …

9, 18, 36, 72, …

1, -2, 4, -8, …

1, 8, 27, 64, …

**Exercise**

Now let’s complete exercise 1 from pages 47 to 49 of the core textbook:

The answers are below: