Arithmetic
Explicit Models
Example 1
Find the first four terms of an arithmetic sequence whose first term is -1 and whose difference is 4.
Step 1. Use the first term and the common difference to find the terms.
-1 + 4 = 3
3 + 4 = 7
7 + 4 = 11
Therefore, the first four terms are -1, 3, 7, and 11.