# Quadratic sequences

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##### Intros

##### Examples

###### Lessons

**Identifying the a,b,c's**

The nth term of a quadratic sequence is always in the form:

$an^{2}+bn+c$

For each following quadratic expressions, find the values of a, b, c. Then list the first three terms of the sequence:**Finding the second common difference**

Find the second common difference of the following sequence:

3, 13, 27, 45, 67, ... - Find the second common difference of the following sequence:

1, 5, 15, 31, 53, ... **Finding the nth term**

Find the nth term of the following quadratic sequence:

8, 11, 16, 23, ... - Find the nth term of the following quadratic sequence:

7, 16, 27, 40, ...