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:

f (n) = 3n + 2	f (n) = 2n + 3
f (n) = 2n - 3	f (n) = 3n - 2

b) Which recursive formula generates this sequence?
Choose:

f (1) = 5;    f (n) = f (n + 1) + 2

f (1) = 5;    f (n) = f (n - 1) + 4

f (1) = 5;    f (n) = f (n + 1) + 4

f (1) = 5;    f (n) = f (n - 1) + 2

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

21

23

25

27

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: f (n) = 26400 - 3050(n - 1)   f (n) = 26400 + 3050(n - 1)   f (n) = 26400 - 3050(n + 1)   f (n) = 26400 + 3050(n + 1)

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

b) Which recursive formula generates this sequence?
Choose:

f (1) = 1;    f (n) =• f (n + 1)

f (1) = 1;    f (n) = • f (n - 1)

f (1) = 1;    f (n) = f (n + 1) +

f (1) = 1;    f (n) = f (n - 1) +

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

6

9