Question

write an explicit formula for the geometric sequence

25, 5, 1, 1/5

Answer 1

Do you see a relation between each number and the one next to it?

Answer 2

yes, they are divided by 5

Answer 3

there is your formula

Answer 4

xn+1= xn /5
what it's saying is that the next number is 1/5 the last number

Answer 5

so that would be \[A _{n-1}=\frac{ A _{n} }{ 5 }\]

Answer 6

exactly

Answer 7

thank you

Answer 8

you're welcome, always willing to help