Answer the questions below and show all work.

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

-3, -8, -13

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

3, -1, -5, -9

3. Find S₁₅for the series -1 + -3 + -5 + -7 +...

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

-10, 20, -40, 80

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

-2, 4, -8, 16

6. Find the 5^thterm of the sequence in which t₁= 8 and t_n= -3t_n-1.

7. Find S₈for the series -2 + -10 + -50 + -250 +...

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