geometric sequence

Question

 find the common ratio and the 8th term of 1, 125,225, 45, 9

Answer 1

Hello Kim.

If you check the pattern; you will notice that each term is divided by 5 to get next one;

(1125/5 = 225, 225/5 = 45, etc.)

9 is the 4th term;

5th term:9/5

6th term: 9/25

7th term: 9/125

8th term: 9/625

hope that helps