I am doing a practice test and I am stuck on a couple of questions.

Question

1.) Write a rule for the following sequence
8, -1, -10, -19

2.) Find the next three terms of the sequence
-2, -12, -72, -432

3.) Which explains why the sequence 81, 3, 1/9

thanks

Answer 1

1.) 9 is subtracted from the previous number.

What rules do you see for the others?

Answer 2

1. arithmetic sequence with a = 8 and d = -9

2. geometric series with first term -2 and ratio r = 6

3. geometric again r = (1/9)

hey
http://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html

http://www.mathsisfun.com/algebra/sequences-sums-geometric.html

Answer 3

What are all the answers

Answer 4

Yea what are they

Answer 5

Nobody knows. I'm SAD