Question

Can anyone help me with this problem

Answer 1

Answer:

third option

Step-by-step 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

$\frac{1}{4}$ $(2)^{k-1}$ ← is in this form

with a₁ = $\frac{1}{4}$ and r = 2