Geometric
Explicit Models
Example 3
Find the explicit model for the following sequence:
-1, -3, -9, -27 …
Step 1. Determine the common ratio.
Every ratio will be three, r = 3.
Step 2. Substitute r = 3 and a1 = -1 into the formula and simplify.
Find the explicit model for the following sequence:
-1, -3, -9, -27 …
Step 1. Determine the common ratio.
Every ratio will be three, r = 3.
Step 2. Substitute r = 3 and a1 = -1 into the formula and simplify.