Question

The fourth term of a sequence is 18.

The term – to – term rule is : ‘ Subtract 3 then multiply by 3.’ What is the first term of the sequence?

Answer 1

11/3

Explanation:

let the 3rd no be x

(x-3)3 = 18

x-3 = 6

x = 9

keep solving the equation and the first term will be 11/3