Chapter 12 Sequences and Series - 12.5 Use Recursive Rules with Sequences and Functions - 12.5 Exercises - Skill Practice - Page 830: 4

$4,8,16,32,64$

In order to compute the fifth term we will have to plug $n =1,2,3,4,5$ into the given equation. Initial term $a_1=4$ Now, we have $a_2=(2)(4)=8$; $a_3=(2)(8)=16$; $a_4=(2)(16)=32$; $a_5=(2)(32)=64$ Thus, we have our required terms: $4,8,16,32,64$