Question

Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in the simplest form 15,11,7

Answer 1

Step-by-step explanation:

the sequence is arithmetic due to the common difference that is equal

d=11-15=7-11=-4

 a(n) = a1 +(n-1)d

a1=15

Then :

a(n) = 15+(n-1)-4

hope this helps