### Home > CCA2 > Chapter 2 > Lesson 2.2.3 > Problem2-130

2-130.

Write an equation for each of the following sequences.

1. $10,2.5,0.625,\dots$

Is this geometric or arithmetic?

This is geometric.

$t(n) = 10 \left( \frac{1}{4} \right)^{n-1}= 40 \left( \frac{1}{4} \right)^{n}$

1. $-2,-8,-14,\dots$

Is this geometric or arithmetic?