Question

4. A sequence is represented below.

{3, 4.5, 6.75, 10.125, 15.1875, ...}
Which representation is a formula for the nth term of the sequence?

Answer 1

Explanation:

If you have choices please give then. I'm guessing at what the answer might be.

an = a_n-1 + 1/2 a_n-1

an = 3/2 a_n-1

Let's try it out.

take 3/2 of 6.75 Multiply by 3 first

(3 * 6.75 ) / 2

20.25 / 2

10.125 which is what happens.