Question

Write a formula for the general term (the nth term) of the geometric sequence. Thanks?!

https://gyazo.com/fdbc92258da4d5467818d20816a3eb8f

Answer 1

`a_n=1/2(-1/5)^(n-1)`

Explanation:

`"the nth term of a geometric sequence is."`

`a_n=ar^(n-1)`

`"where a is the first term and r the common difference"`

`"here "a=1/2" and "`

`r=a_2/a_1=(-1/10)/(1/2)=-1/10xx2/1=-1/5`

`rArra_n=1/2(-1/5)^(n-1)`