Question

What is the explicit formula for this geometric sequence?
64, 16, 4, 1,

Answer 1

Answer: $a_{n}=64\left(\frac{1}{4} \right)^{n-1}$

Step-by-step explanation:

The common ratio is 16/64 = 1/4, so substituting into the formula, we get that $a_{n}=64\left(\frac{1}{4} \right)^{n-1}$