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4. Finding Terms in Linear Sequences
To find a specific term, substitute n into the general term formula.
5. Quadratic Sequences
A quadratic sequence has a second difference that is constant. The difference
between the terms changes linearly.
General form
a, b, c (constants)
Finding the formula:
Identify the first differences (subtract each term from the next).
Identify the second differences (subtract the first differences).
Use the values to form a system of equations to find a, b, and c.