Question

Find the 6th term in the

sequence.
5, 20, 80,...
Hint: Write a formula to help you.
1st ferm - Common Ratio desired term - 1)

Answer 1

Explanation:

first term a=5

common ratio r=20/5=4

`a_(n)=ar^(n-1)\\a_(6)=5(4)^(6-1)\\=5(4)^5\\=5120`

Answer 2

5,120

Explanation:

5x4=20

20×4=80

80x4=320

320x4=1,280

1,280x4=5,120

Hope this helps! :)