Given a₁= 5 and a_n= a_{n - 1} + 4, find the explicit formula.

Choose:

an = n + 4	an = 4n + 1
an = 4n - 1	an = 4n + 4

Given the sequence: {5, 7, 9, 11, ...}

a) Which explicit formula generates this sequence?
Choose:

an = 3n + 2	an = 2n + 3
an = 2n - 3	an = 3n - 2

b) Which recursive formula generates this sequence?
Choose:

a1 = 5;   an =  an + 1 + 2

a1 = 5;   an =  an - 1 + 4

a1 = 5;   an =  an + 1 + 4

a1 = 5;   an =  an - 1 + 2

c) What is the 11^th term of the sequence?
Choose:

21

23

25

27

an = 80• (¼)n - 1	an = 80• (¾)n - 1
an = 80 + (¼)(n - 1)	an = 80 + (¾)(n - 1)

The first four terms of a sequence are:
8, 24, 72, 216, ...
Write a recursive function for this sequence.

Choose:

a1= 8 and an= an - 1 + 3n
a1= 8 and an= an -1 • 3n
a1= 8 and an= an - 1 • 3
a1= 8 and an= an -1 + 3

A private school purchases $26,400 of new computer equipment. For tax purposes, the school estimates that the equipment decreases in value by the same amount, $3050, each year. Which explicit function can be used to find the estimated value of the computer equipment?
Choose:  an = 26400 - 3050(n - 1)    an = 26400 + 3050(n - 1)    an = 26400 - 3050(n + 1)    an = 26400 + 3050(n + 1)

Given the sequence:   
a) Which explicit formula generates this sequence?
Choose:

b) Which recursive formula generates this sequence?
Choose:

a1 = 1;   an =•  an + 1

a1 = 1;   an = •  an - 1

a1 = 1;   an =  an + 1 +

a1 = 1;   an =  an - 1 +

c) What is the 5^th term of the sequence?
Choose:

6

9