Intermediate Algebra (11th edition)

CHAPTER 12 Test 711

Write the first five terms of each sequence described.

1. 2.arithmetic, with and
   3.geometric, with and

Determine for each sequence described.

4.arithmetic, with and 5.geometric, with and

Evaluate for each sequence described.

6.arithmetic, with and 7.geometric, with and

8.The numbers of commercial bank offices (main offices and

branches) in the United States for the years 2004 through 2008

are given in the table. What was the average number of banks per

year for that period? Round to the nearest unit.

a 2 = 12 a 3 = 15 a 5 = 4 a 7 = 1

S 5

a 1 = 6 d=- 2 a 5 = 16 a 7 = 9

a 4

a 4 = 6 r=^12

an= 1 - 12 n+ 1 a 1 = 4 d= 2

Test

CHAPTER 12

View the complete solutions to
all Chapter Test exercises on
the Video Resources on DVD.

Step-by-step test solutions are found on the Chapter Test Prep Videos

available via the Video Resources on DVD, in , or on

(search “LialIntermediateAlg”).

CHAPTER

VIDEOS

Year Number

2004 78,473

2005 80,967

2006 83,860

2007 86,150

2008 97,103

Source:U.S. Federal

Deposit Insurance

Corporation.

9.If $4000 is deposited in an ordinary annuity at the end of each quarter for 7 yr and earns

6% interest compounded quarterly, how much will be in the account at the end of this

term?

10.Concept Check Under what conditions does an infinite geometric series have a sum?

Determine each sum that exists.

11. 
    
    
    
    12. 
        
        
        
        13. 
            
        
        
        
        
    
    
    
    

14. 15. 16.

Evaluate.

17.8! 18.0! 19. 20.

21.Expand. 22.Write the fifth term of the expansion

of.

Solve each problem.

23.Christian Sabau bought a new dishwasher for $300. He agreed to pay $20 per month for

15 months, plus interest of 1% each month, on the unpaid balance. Find the total cost of

the machine.

24.During the summer months, the population of a certain insect colony triples each week.

If there are 20 insects in the colony at the end of the first week in July, how many are

present by the end of September? (Assume exactly four weeks in a month.)

a 2 x-

y

3

b

12

13 k- 524

12 C 10

6!

4!2!

a

q

i= 1

6 a

3

2

b

i

a

q

i= 1

a

1

4

b

i

a

3

i= 1

1

2

14 i 2

a

500

i= 1

a^ i

6

i= 1

a^13 i-^52

5

i= 1

12 i+ 82