Question

Consider the following sequence: 8, 6, 4.5, 3.375, ...

What is the Explicit rule for this sequence?

A. an = 8 • (3/4)^n
B. an = 3/4 • 8^n
C. an = 8 • (3/4)^n-1
D. an = 3/4 • 8^n-1

Answer 1

Answer:

C is the correct answer

Step-by-step explanation:

it is geometric  sequence

r=6/8=4.5/6=3/4

By using this equation:

a(n)=a*r^(n-1)

and we have a=8 , r=3/4

Then       a(n)=8*(3/4)^(n-1) ⇒(C)

hope this helps