please help meeee!!!

Question

What is the explicit formula for the sequence below?

9, 5, 1, -3, …

Answer 1

Hello, Christina,

A formula for this could be constructed by assigning each number in the sequence a value of x, such that x is an integer from 1 and higher. This is the order of the sequence. As Brenda D. points out, each number decreases by 4 as x increases by 1.

One way to write this is 13-(4x)

Try it for x= 4 and x=2

13-(4*4) = -3

13-(4*3) = 1

It seems to work.Pick any sequence number and you'll find the value of that sequence item.

Bob