Big Ideas Math Algebra 1 A Bridge to Success
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Big Ideas Math Algebra 1 A Bridge to Success View details
6. Arithmetic Sequences
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Exercise 2 Page 209

An arithmetic sequence goes up, or down, in equal-sized steps.

See solution.

Practice makes perfect
In an arithmetic sequence, you can find each new term by always adding (or subtracting) the same number to the previous term. The number that is added or subtracted each time is called the common difference of the sequence. Therefore, a pattern that increases or decreases by the same amount each time can be described by an arithmetic sequence.


Example

A small cinema has 25 rows of seats and the first row has 18 seats. Each row has two more seats than the previous row. The number of seats in each row, from the first to the last, can be written as an arithmetic sequence.