Sequences are sets of numbers that are connected in some way. In a quadratic sequence, the difference between each term increases, or decreases, at a constant rate.

What's the second difference in this sequence:

What's the second difference in this sequence: ?

If the second difference is , the term is certain to include the term:

What's the next term in this quadratic sequence: ?

What's the term for the sequence ?

What's the term in this quadratic sequence: ?

What's the term in this sequence: ?