Algebra-1

To write the recursive formula for the sequence 15, 12, 9, 6, ..., follow these steps:

Identify the common difference:

Calculate the differences between consecutive terms:

12−15=−3

9−12=−3

6−9=−3

The common difference d is −3.

Write the recursive formula:

The general form of the recursive formula for an arithmetic sequence is:

= + d

In this case, the common difference d is −3. Also, the first term

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