Question

4, 8, 16, 32, ... n is an integer, which of these functions generate the sequence?

Answer 1

see below

Explanation:

4*2 = 8

8*2 = 16

16*2 = 32

We are multiplying by 2 each time

an = 4 ( 2) ^ ( n-1)

but 4 = 2*2

an = 2^2 * 2^ n-1

an = 2 ^ ( n+1)