### Home > CCG > Chapter 4 > Lesson 4.2.5 > Problem 4-111

4-111.

Consider the sequence

Find the value of

if the sequence is arithmetic.What is the difference between the first two numbers in the sequence?

Add the difference to

. The third number is

, set this equal to . Find the value of

if the sequence is geometric.Follow the same steps from part (a) but replace the addition with multiplication.