Question

Consider the sequence.


4.5, −22.5, 112.5, −562.5, …

Answer 1

aⁿ = 4.5 x (-5)ⁿ⁻¹

Explanation:

Because aⁿ = 4.5 x (5)ⁿ⁻¹ will give the second term as 22.5 and not -22.5