Question

For the following geometric sequence, find the explicit formula.

Answer 1

Answer: $a_{n} = (-3)^{n-1}$

Step-by-step explanation:

$a_{n} = a_{1} r^{n-1}$   ; where a₁ is the first term and r is the ratio

$a_{n} = 1 (-3)^{n-1}$

$a_{n} = (-3)^{n-1}$