### Home > INT3 > Chapter 8 > Lesson 8.3.4 > Problem8-149

8-149.
1. Recall that equations representing sequences can be written in the form t(n) = mn + b or t(n) = abn. Write an equation for each of the following sequences. Homework Help ✎

1. 10, 2.5, 0.625, …

2. –2, –8, –14, …

Is this geometric or arithmetic?

$10=ab^1$

$2.5=ab^2$

$t(n) = 40 \left( \frac{1}{4} \right)^{n}$

Is this geometric or arithmetic?