Quadratic Sequence Formula
A quadratic sequence has a general term of the form:
u_n = an² + bn + c
Where:
• a, b, and c are constants
• n is the position in the sequence
Method to find the formula:
1. Find the second difference of the sequence.
2. a = (second difference) ÷ 2.
3. Use the first terms to solve for b and c.
4. Substitute into u_n = an² + bn + c.
