1.Which of the following represents an arithmetic sequence?

1. 10, 8, 6, 5
2. 6, 8, 11, 13
3. 5, 3, 1, -1
4. 5, -5, 5, -5

2.Which of the following represents an arithmetic sequence?

1. 5, -10, 20, -40
2. 3, 1, 4, 2
3. 2, 4, 8, 16
4. 3, 5, 7, 9,

3.The following is an arithmetic sequence.

1, 2.5, 4, 5.5

TRUE

FALSE

4.The following is an arithmetic sequence.

7, 6.5, 6, 5

TRUE

FALSE

5.What is the common difference of the following arithmetic sequence?

-8, 0, 8, 16

1. -8
2. 7
3. -7
4. 8

6.What is the common difference of the following arithmetic sequence?

1. -3, -5, -7, -9
2. 2
3. 1
4. -1
5. -2

7.What is the common difference of the following arithmetic sequence?

8, 10, 12, 14

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

8.What are the next 3 terms in the following sequence?

1. 2.3, 6.6, 10.9

9.What are the next 3 terms of the following sequence?

1. 3, -1, -5, -9

10.What are the next 3 terms of the following sequence?

1. 5.5, 6.7, 7.9, 9.1,...

11.Find the 10th term of an arithmetic sequence if t₁ = 2.1 and t₄ = 1.83.

12.Find the four arithmetic means between 40 and 100.

13.Find the sixth term of an arithmetic sequence with t₁ = 2 and t_n = t_n-1 + 4

14.Find S₁₅ for the series -1 + -3 + -5 + -7 +...

15.Find S₂₀ of the arithmetic series 14 + 16 + 18 + 20 +...