Answers

2016-07-12T15:05:44+08:00
The Brainliest Answer!
  • Brainly User
2016-07-12T15:45:58+08:00
Ratio means fraction.  Therefore given the sequence, you divide, and not multiply to get the ratio.  

20/5 = 4
82/20 = 4
320/80 = 4

ANSWER: Common Ratio = 4

Now, given the ratio you multiply this by the previous term to get the next immediate term.  That, is to 320 x 4 = 1,280  (5th term)
1 5 1