Question

Can anyone help me with this problem

Answer 1

third option

Explanation:

The n th term of a geometric sequence is

`a_(n)` = a₁
`(r)^(n-1)`

where a₁ is the first term and r the common ratio

`(1)/(4)`
`(2)^(k-1)` ← is in this form

with a₁ =
`(1)/(4)` and r = 2