1.Find S₁₂ for the series 2 + 5 + 8 +...

2.The following is a geometric sequence.

-5, 15, 45, -225

TRUE

FALSE

3.The following is a geometric sequence.

-5, 25, -125, 625

TRUE

FALSE

4.The following is a geometric sequence.

-1, 1, -1, 1, -1

TRUE

FALSE

5.The following is a geometric sequence.

7, 10, 13, 16

TRUE

FALSE

6.What is the common ratio of the following sequence?

7, -7, 7, -7,

1. -1
2. 2
3. 1
4. -2

7.What is the common ratio of the following sequence?

8, 64, 512, 4096

1. 7
2. 8
3. 9
4. 10

8.What is the common ratio of the following sequence?

9, -27, 81, -243

1. -1
2. -2
3. -3
4. -4

9.What are the next three terms of the following sequence?

1. -2, 4, -8, 16

10.What are the next three terms of the following sequence?

1. 1, 3, 9, 27

11.What are the next three terms of the following sequence?

1. -5, -15, -45, -135

12.Find the 5^th term of the sequence in which t₁ = 8 and t_n = -3t_n-1.

_13.Find the 6^th term of a geometric sequence with t₁ = 7 and t₉ = 45,927

14.Find the 6^th term of the sequence with t₁ = -4 and t_n = 5t_n-1.

15.Find two geometric means between 10 and 1250.

16.Find S₇ for the series 1 + 5 + 25 + 125 +...

17.Find S₈ for the series -2 + -10 + -50 + -250 +...

18.Find S₁₂ for the series 1 + 1.5 + 2.25 + 3.375 +...

19.Find S₁₀ for the series 1 + 2 + 4 + 8 +...

20.Find the sum of the infinite series 0.9 + 0.09 + 0.009 +...if it exists.

21.Find the sum of the infinite geometric series 8 + 4 + 2 + 1 +...if it exists.