What are sequences?

The document provides examples and explanations of arithmetic and geometric sequences. It defines an arithmetic sequence as one where the difference between consecutive terms is constant, and a geometric sequence as one where the ratio between consecutive terms is constant. Examples are given to demonstrate identifying whether a sequence is arithmetic or geometric and calculating the common difference or ratio. Students are given practice problems to determine if sequences are arithmetic, geometric, or neither, and to write the next three terms. A reflection question asks to identify the non-matching sequence type from options given.