Please Help: 9.3.1 Activity

fTOPIC 9-3 Independent Practice & Application A. For each sequence, determine whether the sequence is arithmetic (A), geometric (G), or neither (N). 1. _ 5,25,125,... 2. _ 8,6,12,2,... 3. _ 111,2.5,115.5,... 4. _ 3,10,31,... 5. _ 1,2,4,8,... B. For each of the following geometric sequences, determine both the recursion formula and the general rule for the nth term. Then use the general rule to calculate the 7th term. 6. 16,2,l,... 4 7. 3,12,48,... C. For each of the following sequences, determine the indicated geometric means. 3. 8,_,_,_,_,25,000,... 9. 180,_,_,_,_,5.625,... D. Determine each geometric series. Use the graphing calculator to verify your results. 10. The sum of the first 12 terms of the sequence: 9,4.5,2.25,... 11. S16 for the series 5 + 20 + 80 + 00 12. Z3(.2)"'1 n=1 E. The ABC company manufactures and sells cellular telephones. The company's gross sales, beginning in the rst year of operation, are as follows: Sales(in millionsof 1.032 2.193 10.203 US Dollars 13. Is the sales growth for ABC Company a geometric sequence? Why? If so, what is the common ratio? 14. If the sales growth pattern continues, what will be the sales for ABC Company in year 12? 15. What will be the total sales for ABC Company for years 1 through 12